TY - BOOK TI - Top secret data encryption techniques AU - Held, Gilbert, 1943- SN - 0672302934 (pbk.) : PB - Sams Publishing PP - Carmel, Ind. : Sams Publishing, c c1993. PY - 1993 UR - https://library.korea.ac.kr/detail/?cid=CAT000000108993&ctype=m