TY  - JA
AU  - Erdos,L.
TI  - Changes in the yield structure of maize
SN  - 0001-513X
U1  - 81-684706 
PY  - 1980///
KW  - Maize
KW  - AGROVOC
KW  - Plant production
KW  - Zea mays
N1  - 3 tables; 9 graphs; 2 ref
T2  - Acta Agronomica Academiae Scientiarum Hungaricae
ER  -