1. Simultaneous selection for milk and beef production among Holstein-Friesians;Calo;J. Dairy Sci.,1973
2. Progress in the selection of the Latin American Criollo;DeAlba;World Anim. Rev.,1978
3. Production economics: Theory with applications;Doll,1978
4. Utilizing breed differences in growth of cattle in the tropics;Frisch;World Anim. Rev.,1978
5. Linear programming methods;Heady,1958