'April, 1946.' 'Showing location of wells, springs, and boundary between valley fill and bedrock.' At top of map: 'United States Department of Interior, Geological Survey. Water resources bulletin no. 5, plate 5. ' 'State Engineer of Nevada.' At bottom of map: 'Map showing soils, land classification, and alkali concentration in part of Las Vegas Valley.' Includes range and township grid. Scale [ca. 1:71,597. 1 in. to approx. 1.13 miles]. Series: Water resources bulletin (Carson City, Nev.), no. 5. Originally published as plate 5 in Geology and water resources of Las Vegas, Pahrump, and Indian Spring Valleys, Clark and Nye Counties, Nevada by George B. Maxey and C.H. Jameson, which is number 5 of the Water resources bulletin published by the Nevada Office of the State Engineer.