Annotated outline concerning new achievements in technologies of cultivation and harvesting of crops ensuring the preservation of natural soil fertility / transmitted by the government of the USSR and the German Democratic Republic ; prepared P.N. Burchenko and V.A. Rusanov and H. Dell and H. Petelkau ; note by the Secretariat.
Annotated outline concerning new achievements in technologies of cultivation and harvesting of crops ensuring the preservation of natural soil fertility / transmitted by the government of the USSR and the German Democratic Republic ; prepared P.N. Burchenko and V.A. Rusanov and H. Dell and H. Petelkau ; note by the Secretariat.