It turns out 4 numbers per month

Railway: a magazine published by the VIII department of the Imperial Russian Technical Society.-St. Petersburg, 1882-1917.-.I. Russian Technical Society.Department (8) .1.People (collection).2. Territory (collection).Electronic copy source: PBOriginal storage location: PSUPSG. 4. 1885. No. 10-11.- Type.br.Panteleev, 1885. -69-84 p.: table .. -It turns out 4 numbers per month.Content: from the editorial office.Notes on the Trans-Caspian Military Railway to Kizil-Arvat: (ending) / N. Poltoranov.Financial information on the operation of the Trans -Caspian Military Railway.Access system in America.The elevator of the American system for 276,000 hectoliters = 132.480: (ending) / A. Kumanin, [et al.].- Bibliogr.in the text and subscription.Note .. - Ex.: Without a region., With a handle.litter..1. The people (collection).2. Territory (collection).Electronic copy source: PBOriginal storage location: PSUPS