Abdullahi, Nuhu <br/><br/>
Combining ability studies for yield and some agronomic characters in quality protein maize (QPM). 
by  Nuhu Abdullahi 
 - Ahmadu Bello University, Zaria  Department of Plant Science,  2006 
 - xiv, 104 leaves :ill. 
<br/><br/> Bibliography :86 - 98