LEADER 00000nam 2200193 a 4500
001 0085481
003 UkHlHU
007 t
008 001308 0 1944 000 eng
040 UkHlHU
050 4 Z 103 S6
100 0 Smith, Lawrence Dwight.
245 00 Cryptography, the science of secret writing.
260 London :|bAllen & Unwin,|c1944.
300 164p.
650 0 Cryptography.
946 650 |a Subfields only, containing single words only. No
600s present -- Check for possible Geac subject headings
|