Physical description for original version: iv, 23 p. : 29 cm
書誌注記
Bibliography: p. C 21-23
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, Text Products Section, U.S. Geological Survey, 1985