Physical description for original version: iv, 53 p. : 24 cm
書誌注記
Bibliography: p. 52-53
原資料等に関する注記
原資料の出版事項: [Reston, Va.?] ; Alexandria, Va. : Dept. of the Interior, U.S. Geological Survey : For sale by the Distribution Branch, U.S. Geological Survey, 1984