一般注記Shipping list no: 91-542-P
"July 1991"--P. [4] of cover
"OTA-TCT-497"--P. [4] of cover
Physical description for original version: viii, 50 p. : 26 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. : Congress of the U.S., Office of Technology Assessment : For sale by the Supt. of Docs., U.S. G.P.O., [1991]
ISBN: 0160336384 (: )
SUPTDOC番号: Y 3.T 22/2: 2 Au 8/6
テクニカルリポート番号: OTA-TCT-497
GPO管理番号: 1070-M