From the Homer Rissman Architectural Records (MS-00452). Written on the image: "Rissman and Rissman Associates 1011 Swarthmore Avenue Pacific Palisades California Gladstone 4-7519. Scale 1'-30'. Architects. Structural Engineer Harold L. Epstein 3324 Barham Blvd. Los Angeles, Calif. 90028 Hollywood 3-7121. Mechanical Engineer Ira Tepper & Associates 1147 So. Beverly Drive Los Angeles, Calif. 90035 Crestview 6-1736. Electrical Engineer J.L. Cusick & Associates 4219 Lankershim Blvd. North Hollywood, Cal. 91602 Triangle 7-6231. 3-4-67 Date. Hotel Bonanza of Las Vegas U.S. Highway #91 Las Vegas, Nevada 1st Additions. Site Plan Phase III. 2 drawing number".
From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). The sign says, "YOU ARE NOW ENTERING NEVADA TEST SITE NO TRESPASSING BY ORDER OF THE UNITED STATES DEPARTMENT OF ENERGY".