Bulletin of the Society of Technologists.1899. [T.6].No. 4. April

Society of Technologists (Petersburg).Bulletin of the Society of Technologists.-St. Petersburg, 1894-1914.-.1. The people (collection).Electronic copy source: PBOriginal storage location: PSUPS1899. [T.6].No. 4. April: year of ed.6. - Type.R. Golika, 1899. -133-172 p.: table., Il .. -It turns out once a month.Bibliogr.in the text.- Ex.: Without region..1. The people (collection).Electronic copy source: PBOriginal storage location: PSUPS