TY  - TH
AU  - Ahmadzadeh,Ardeshir
TI  - Physiological basis of heterosis and combining ability in maize (Zea mays L.)
PY  - 2003///
CY  - Guelph, Ontario (Canada)
PB  - University of Guelph, 
N1  - Thesis (Ph. D.)
ER  -