Archival objects in this container: Air Quality Implementation Plan; Las Vegas Valley, Clark County, Nevada - Revised by Clark County Department of Comprehensive Planning, 1980 November 18 Airs Facility Subsystem User's Reference Manual by TRC Environmental Consultants, Inc, approximately 1960 to 1980 IBM Full Screen Processing Using: ISPF, TSO, JCL, and SDSF by National Computer Center Training, approximately 1960 to 1980 District Board of Health of Clark County; Air Pollution Regulations by Districts Board of Health of Clark County, approximately 1992 April 30 to 1993 May 27 AFS; Airs Facility Subsystem User's Reference Manual by TRC Environmental Consultants, Inc, approximately 1960 to 1980 AIRS; Aerometric Information Retrieval System User's Guide - Volume AM-2 - Area & mobile Source Subsystem - Data Coding by U.S Environmental Protection Agency, 1993 February