Physical description for original version: iv, 14 p. : 28 cm
書誌注記
Includes bibliographical references (p. 14)
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) ; Rockville, MD : U.S. Dept. of Agriculture, Economic Research Service : ERS-NASS [distributor, 1990]