Physical description for original version: xvi, 150 p.
書誌注記
Includes bibliographical references (p. 144-149)
原資料等に関する注記
原資料の出版事項: [Washington, D.C.?] ; Denver, CO : U.S. Dept. of the Interior, U.S. Geological Survey : For sale by the Books and Open-File Reports Section, [1990?]