一般注記Distributed to depository libraries in microfiche
"June 1991."--P. iii
Physical description for original version: iv, 68 p. ; 28 cm
書誌注記Includes bibliographical references (p. 30-34)
原資料等に関する注記原資料の出版事項: [Washington, DC] : U.S. Dept. of Agriculture, Economic Research Service, Agricultural and Rural Economy Division ; Rockville, MD : ERS-NASS [distributor, 1991]
SUPTDOC番号: A 93.44: AGES 91-25
GPO管理番号: 0042-W-01 (MF)