一般注記Distributed to depository libraries in microfiche
"July 1990"--Cover
Physical description for original version: 34 p. : 28 cm
書誌注記Includes bibliographical references (p. 22-26)
原資料等に関する注記原資料の出版事項: Portland, Or. (319 S.W. Pine St., Portland 97208) : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1990
SUPTDOC番号: A 13.88: PNW-GTR-256
GPO管理番号: 83-B-6 (MF)