Physical description for original version: vi, 44 p. : 26 cm
書誌注記
Bibliography: p. 43-44
原資料等に関する注記
原資料の出版事項: [Reston, Va.?] ; Alexandria, Va. : U.S. Dept. of the Interior, Geological Survey : Distribution Branch, Text Products Section, U.S. Geological Survey, 1983