Title: O shifrakh
First published: 1902
Subjects: Communication systems, Cryptography, Prisons, Rossiĭskai︠a︡ sot︠s︡ial-demokraticheskai︠a︡ rabochai︠a︡ partii︠a︡, Rossiĭskai͡a sot͡sial-demokraticheskai͡a rabochai͡a partii͡a
Places: Russia
LC classification: Z103.4.R8 B35 1902