Physical description for original version: v, 30 p. : 28 cm
書誌注記
Bibliography: p. 27-30
原資料等に関する注記
原資料の出版事項: Austin, Tex. ; Denver, Colo. : U.S. Dept. of the Interior, Geological Survey : Open-File Services Section, Western Distribution Branch, U.S. Geological Survey [distributor], 1984