TY  - JOUR 
T1  - Effects of plant population and nitrogen fertilizer on yield and efficiency of maize-bean intercropping
JO  - Pesquisa Agropecuária Brasileira
A1  - Morgado, Luiz Balbino
A1  - Willey, Robert William
SN  - 0100-204X
UL  - 10.1590/S0100-204X2003001100002
VL  - 38 
Y1  - 2003
PB  - Brasil 
ER  -