United States Cryptographic Patents 1861-1989
Cryptologia, July 1991. First Thus. Paper Back. Quarto; {8 & 1/4' x 10 & 3/4'}; sunned spine. Foxing top edge, fore-edge and inside first page and verso of front cover. 115 pages. More
Cryptologia, July 1991. First Thus. Paper Back. Quarto; {8 & 1/4' x 10 & 3/4'}; sunned spine. Foxing top edge, fore-edge and inside first page and verso of front cover. 115 pages. More
Cryptologia, July 1991. First Thus. Paper Back. Quarto; {8 & 1/4' x 10 & 3/4'}; Heavily sunned spine; foxing top edge. well worn at top of spine. 115 pages. More
Cryptologia, Inc., February 1983. Stapled Pamphlet. Quarto. {8 & 1/2' x 11'}; Stapled soft cover with sunned/tanned margins. Stated, 'First Printing.' Sound binding. Unmarked interiors. No underlining. No notes. Etc. 69 pages. More