by Mel'nikov, N.N, Chaskin, B.A, Stonov, L.D, Sablina, I.V, Usaceva, N.M, Gordon, O.G, Gruzinskaja, N.A
Published in Deut Akad Landwirtschaftswiss Tagungsber (1970)

by Mel'nikov, N.N, Khaskin, B.A, Stonov, E.D, Sablina, I.V, Usacheva, N.M, Gordon, O.G, Gruzinskaia, N.A
Published in Agrokhimiia (1969)

by Mel'nikov, N.N, Stonov, L.D, Khaskin, B.A, Usacheva, N.M, Gordon, O.G, Gruzinskaia, N.A, Sablina, I.V
Published in Agrokhimiia (1969)