V P Petrov

3 books

Feb 10, 2013
Cover of Podsechnoe Zemledelie

Podsechnoe Zemledelie

Jan 29, 2013
Cover of Informatsionnaya bezopasnost' cheloveka i obschestva

Informatsionnaya bezopasnost' cheloveka i obschestva

Dec 1961
Cover of Artificial Satellites of the Earth

Artificial Satellites of the Earth