Smirnov V. Brief summary of the course of chemical warfare agents in the tables In Russian (ask us if in doubt)/Smirnov V. Kratkiy konspekt kursa boevykh otravlyayushchikh veshchestv v tablitsakh. Posobie dlya boytsov i nachal'stvuyushchego sostava podrazdeleniy i chastey khimicheskoy zashchity Main Directorate of Internal Troops of the NKVD USSR 1943. 2 and 10 p. SKUalb4f43069011810564.