00677nam a22002412a 450000100060000000300080000600500170001400800410003103500190007204000370009104100080012808200200013610000280015624500470018425000190023126000610025030000280031150400410033965000120038065000170039283000060040983000200041514975BD-RjUL20211208235728.0140209r1952    enka     b    001 0 eng d  a(BD-RjUL)15029  aNCScNCSdVYLdEQOdBD-RjULbeng  aeng  a652.8bDAC 19521 aD'Agapeyeff, Alexander.10aCodes and ciphers /cAlexander d'Agapeyeff  aRev. and reset  aLondon :bG. Cumberlege, Oxford university press,c1952.  a149 p. :bill. ;c19 cm  aBibliography: p. 145-146. and index. 0aCiphers 0aCryptography 0v1 0aCompass books ;