Timber skidding by tractor in the U.S.S.R. /
Voronit︠s︡yn, K. I.(Konstantin Ivanovich),author.
Lepentzov, P. A.,author.
Perfilov, M. A.,author.
Great Britain.His Majesty's Stationery Office.
United Nations,issuing body.
"59.II.E/Mim.12."
Joint Committee on Forest Working Techniques, and Training of Forest Workers (in collaboration with the ILO).