Materials for describing Russian rivers and the history of improvements to their shipping conditions.Ext.69. River dredging shel...

Materials for describing Russian rivers and the history of improving their shipping conditionsExt.69: river dredging shells: Atlas / comp.Ed.Settlement.Ord.Prof., CHL.Ing.Council of the Mr. Ways of Message Ing.G.K.Merching, Ing.K.E.Kolbe and F.F.Petrov;The Ministry of Railways.- Petrograd: ed.Directorate of internal waterways and highways, 1915. -[2], v., 131 p.pl., devil .. -.I. Petrov, F.F. II.Merching, G.K .. III.Russia.The Ministry of Railways.IV.Kolbe, K.E..1.Territory (collection).Electronic copy source: PBOriginal storage: RSGMU