Physical description for original version: iii, 92 p. : 23 cm
原資料等に関する注記
原資料の出版事項: Washington, D.C. ; Springfield, VA : U.S. Dept. of Commerce, International Trade Administration : For sale by the Supt. of Docs., U.S. G.P.O. : For public sale by U.S. Dept. of Commerce, National Technical Information Service, 1991