Alhussein, Mohammedein B., 		Ibrahim, Abu Elhassan S., AND 		Ali, Eltahir S..
" Combining ability for grain yield and yield components in local inbred lines and introduced open pollinated varieties of maize (Zea mays L)" <em>Gezira Journal of Agricultural Science</em> [Online], Volume 11 Number 1 (1 January 2013)