The National Congress of American Indians (NCAI) and Bureau of Indian Affairs (BIA) Data Management, Needs Assessment, and Auditing Workgroup files document the workgroup’s efforts to manage, regulate, and assist Native American gaming enterprises from 1995 to 2007, with the bulk of materials dating from 1997 to 2001.The materials document the creation and administration of the workgroup, institutional and political approaches to Native American gaming, and national legislation about Native American issues. The materials include reports; a cooperative agreement between the BIA and NCAI; senate bills and testimonies; Legal Services Corporation reports and materials; "NCAI Sentinel" and BIA newsletters; informational packets; Dr. Spilde’s contract and notes on meetings and personal research; memos; legal briefs; book chapters from other scholars; surveys; journal articles; and newspaper articles.

Additional materials relating to NCAI can be found in the National Congress of American Indians (NCAI) subject files located in general subject files. Materials directly related to Spilde’s activities as a member of the workgroup were placed in the National Congress of American Indians (NCAI) and Bureau of Indian Affairs (BIA) Data Management, Needs Assessment, and Auditing Workgroup files. Other materials about NCAI were placed in the NCAI subject files or the National Indian Gaming Association (NIGA) and the National Congress of American Indians (NCAI) Joint Task Force files.

The Harvard Project on American Indian Economic Development (HPAIED) files document the HPAIED’s efforts to research the socioeconomic impacts of Native American gaming from 1990 to 2010, with the bulk of materials dating from 2000 to 2005. The materials in this subseries document Dr. Spilde’s research while working for the HPAIED, offering valuable insight into the administration of the organization. The subseries includes materials collected by Dr. Spilde about HPAIED, the ᏣᎳᎩᎯ ᎠᏰᎵ (Cherokee Nation), the Choctaw Nation of Oklahoma, and the Mvskoke (Muscogee [Creek] Nation). Also included are socioeconomic reports, NIGA reports, site visit reports, notes, HPAIED studies, essays, “Honoring Nations” HPAIED awards program materials, Harvard University promotional materials, research proposals, Oklahoma Indian Gaming Association materials, census data, bibliographies, informational booklets and packets, conference materials, and newspaper articles.

The National Council on Problem Gambling (NCPG) files document the organization’s administration and research priorities dating from approximately 2000 to 2008. Materials include NCPG annual reports, socioeconomic reports, bylaws, financial statements, board meeting minutes, agendas, financial statements and records, informational packets, newsletters, memos, correspondence, lists of board members, notes, conference materials, journal articles, promotional materials, and newspaper articles.

The University of California, Riverside (UCR) files contain materials about the UCR California Center for Native Nations, a research center that focuses on the preservation of California Native American history, culture, language, and sovereignty. Materials focus on Native American gaming, problem gambling, federal recognition of Native American communities, trust land issues, and off-reservation casinos. The subseries dates from approximately 1998 to 2009, with the bulk of materials dating from 2004 to 2007. The materials include socioeconomic reports, congressional legislation, federal law summaries, Federal Register entries, NCAI correspondence, Dr. Spilde’s notes, newsletters, agendas, correspondence, UCR periodicals, conference booklets, informational packets, journal articles, and newspaper articles. The materials document Dr. Spilde’s research while working at UCR, and also the issues of problem gambling, Native American federal recognition, and trust land issues.

The anthropology teaching and research files contain materials on anthropological topics, such as Dr. Spilde’s graduate teaching courses, syllabi, and student papers; anthropological organizational booklets; and general anthropology books, articles, and book reviews (1980, 1993-2008).

The general notes subseries contains Dr. Spilde’s notes on conferences, research, and work topics dating from approximately 1997 to 2010.

The conference materials include resources and research collected by Dr. Spilde during conferences (1994, 2000-2015). Materials include annual reports, newsletters, biographies, presentations, informational packets, directories, notes, invitations, attendee rosters, conference papers, memos, correspondence, event guides, pamphlets, video and audio recordings of conferences, and newspaper articles from the 5th Annual Alberta Gaming Institute, 12th Annual Indian Gaming Conference, First International Symposium on Economic and Social Impacts of Gambling, International Conference on Gambling and Risk Taking, Global Gaming Expo (G2E), iGaming of North America and Asia, Saratoga Institute on Equine, Racing, and Gaming Law, and 20 Years of IGRA.