Agriculture in 1983
Domestikation: Verarmung Der Merkwelt
by
Hemmer, Helmut
1982
by
The Diversity of Crop Plants
by
Hawkes, J. G.
Allelopathy
by
Rice, Elroy L.
Pond Fisheries
by
Martyshev, F.
Efficient Use of Fertilizers in Agriculture
by
Un Economic Commission for Europe