Physical description for original version: 11 p. : 28 cm
書誌注記
Includes bibliographical references
原資料等に関する注記
原資料の出版事項: Washington, DC (1301 New York Ave., NW, Washington 20005-4788) ; Herndon, VA : [U.S. Dept. of Agriculture, Economic Research Service : ERS-NASS, distributor, 1994]