NTIA special publication
Dept. of Commerce, National Telecommunications and Information Administration
U.S. Department of Commerce, National Telecommunications and Information Administration 1993 NTIA special publication 93-290
Available at 9 libraries
U.S. Department of Commerce, National Telecommunications and Information Administration : For sale by the Supt. of Docs., U.S. G.P.O. [1991] NTIA special publication 91-23
Available at 1 libraries
U.S. Dept. of Commerce 1991 NTIA special publication 91-26
[National Telecommunication and Information Administration]
U.S. Dept. of Commerce : For sale by Supt. of Docs., U.S. G.P.O. [1988] NTIA special publication NTIA-SP 88-21
Available at 10 libraries