Physical description for original version: 83 p. : 24 cm
書誌注記
Includes bibliographies
原資料等に関する注記
原資料の出版事項: [Reston, Va.?] ; Alexandria, VA ; [Washington, D.C. : Dept. of the Interior, U.S. Geological Survey : For sale by the Distribution Branch, USGS : Supt. of Docs., U.S. G.P.O., distributor], 1984