Physical description for original version: 125 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, D.C. : U.S. Dept. of Labor, Secretary's Commission on Achieving Necessary Skills : For sale by the Supt. of Docs., U.S. G.P.O., 1993