No reference about volume Included: 1940 No. 1-4, 6, 7 ; 1941 No. [13]-16 ; ; 1942 No. 17, 19-25 ; 1943 No. 27, 29-37 ; 1944 No. 3-4=40-41, 6-8=43-45 Missing No. 5, 8-12, 18, 26, 28, 38, 42 Title change: from No. [13]: Tsirkuliarnoe pis'mo Soiuza russkikh inzhenerov i tekhnikov v Protektorate Chekhiia i Moraviia; from No. 16: Tsirkuliarnoe pis'mo Professional'nogo soiuza russkikh inzhenerov i tekhnikov v Protektorate Chekhiia i Moraviia; from No. 19: Informatsionnoe pis'mo Professional'nogo soiuza russkikh inzhenerov i tekhnikov v Protektorate Chekhiia i Moraviia; from No. 21: Tsirkuliarnoe soobshchenie Professional'nogo soiuza russkikh inzhenerov i tekhnikov v Protektorate Chekhiia i Moraviia; from No. 32: Tsirkuliarnye soobshcheniia Professional'nogo soiuza russkikh inzhenerov i tekhnikov v Protektorate Chekhiia i Moraviia Redaktor: L. S. Lada-Iakushevich Change of editors: in No. 3 no reference about the name of the editor; No. 4 and 6: B. Fus; from No. 7 no reference about names of editors; from No. 23: G. Florianskii; from No. 29: N. S. Zaporozhtsev |