(NsISTEMA LESNYH POLOS (B/s - (NpETROW(B, (NnIKOLAJ gRIGORXEWI^s ((Nm(B. :s (NrOSSELXHOZIZDAT(B,s, 1975)
Keywords: (NpRAKTI^ESKOE LESORAZWEDENIEs