一般注記"This paper was reproduced for limited distribution to the research community outside the U.S. Department of Agriculture"--P. [2]
"June 1985"--P. [2]
Physical description for original version: 31 p. : 28 cm
原資料等に関する注記原資料の出版事項: Washington, D.C. : U.S. Dept. of Agriculture, Economic Research Service, Natural Resource Economics Division, [1985]
SUPTDOC番号: A 93.44: AGES 850328
GPO管理番号: 42-W-1 (microfiche)