Physical description for original version: vii, 153 p. : 28 cm
書誌注記
Bibliography: p. 55-56
原資料等に関する注記
原資料の出版事項: Tacoma, Wash. ; Lakewood, Colo. : U.S. Dept. of the Interior, Geological Survey : Open-File Services Section, Western Distribution Branch, 1983