compiled chiefly from maps of the U.S. Geological Survey ... Alfred H. Brooks, geologist in charge, Division of Alaskan Mineral Resources. 1 map : col. ; 42 x 59 cm. Scale 1:5,000,000. Approx. 80 miles to 1 in. (E 172⁰--W 126⁰/N 71⁰--N 51⁰). Relief shown by hachures and spot heights. Inset: [Aleutian Islands]. "Alaska, map A."