一般注記"National Telecommunications and Information Administration"--Cover
Distributed to depository libraries in microfiche
Shipping list no.: 92-1681-M
"November 1991."
Includes indexes
Physical description for original version: vii, 95 p. ; 28 cm
書誌注記Includes bibliographical references (p. 27)
原資料等に関する注記原資料の出版事項: [Boulder, CO] : U.S. Dept. of Commerce, [1991]
SUPTDOC番号: C 60.11: 91-151
GPO管理番号: 0126-D-10 (MF)