Soviet inventions illustrated.
Derwent Publications, Ltd.
London : Derwent Publications Ltd.,
1976-1977.
Inventions
Patents
Soviet inventions illustrated. Section I, Chemical
Soviet inventions illustrated. Section II, Electrical
Soviet inventions illustrated. Section III, Mechanical & general
Soviet inventions illustrated. Section Ch, Chemical
Soviet inventions illustrated. Section R, Electrical
Soviet inventions illustrated. Sections P, Q, General/Mechanical