TY  - BOOK
AU  - Birecki, M.
TI  - (Investigations on the selection of successive cereal crop and on the successive action of grass-popilionaceous mixtures during a theree year period as depending upon the period of plownig a structure forming field)
KW  - Rotación de cultivos
KW  - Cereales
KW  - Plantas forrajeras
N1  - Resumen en inglés; Sobretiro de : Roczniki Nauk Rolniczych 75 A (1) : 1-35, 1957
ER  -