Physical description for original version: v, 71 p. : 28 cm
書誌注記
Bibliography: p. 71
原資料等に関する注記
原資料の出版事項: Cheyenne, Wyo. ; Denver, Colo. : U.S. Dept. of the Interior, Geological Survey : Open-File Services Section, Western Distribution Branch, USGS, 1984 [i.e. 1985]