References
- Cunningham , E. P. and McClintock , A. 1974 . Selection in dual-purpose cattle populations: effect of beef crossing and cow replacement rates . Ann. Génét. Sél. anim. , 6 : 227 – 239 .
- DeGraff , H. . The importance of animal agriculture in meeting future world food needs . pp. 5 – 13 . Univ. Ill. Coll. Agr. . Spec. Publ. no. 12
- Dickerson , G. E. 1970 . Efficiency of animal production—molding the biological components . J. Anim. Sci. , 30 : 849 – 859 .
- Dickinson , F. N. , McDaniel , B. T. and McDowell , R. E. 1969 . Comparative efficiency of feed utilization during first lactation of Ayrshire, Brown Swiss, and Holstein cows . J. Dairy Sci. , 52 : 489 – 497 .
- Freeman , A. E. 1967 . Genetic aspects of the efficiency of nutrient utilization for milk production . J. Anim. Sci. , 26 : 976 – 983 .
- Gjedrem , T. 1967 . Selection indexes compared with single trait selection. I. The efficiency of including correlated traits . Acta Agric. Scand. , 17 : 263 – 268 .
- Hazel , L. N. and Lush , J. L. 1942 . The efficiency of three methods of selection . J. Heredity , 33 : 393 – 399 .
- Hooven , N. W. , Miller , R. H. and Plowman , R. D. 1968 . Genetic and environmental relationships among efficiency, yield, consumption and weight of Holstein cows . J. Dairy Sci. , 51 : 1409 – 1419 .
- Horn , A. , Bozo , S. and Dunay , A. 1971 . The effect of size and type upon the efficiency of milk and beef production in cattle . Ann. Génét. Sél. anim. , 3 : 71 – 83 .
- Lindhé , B. . Improvement in beef-breeding by selection . 1st World Congr. Genet. appl. Livest. Prod. . pp. 655 – 669 . I
- Maijala , K. 1966 . Repeatabilities and correlations of economic traits in the Finnish Random Sample egglaying test . Annls Agric. Fenn. , 5 : 48 – 63 .
- Maijala , K. 1974 . (Suitability of various animal species as meat-producers.) In Finnish with Swedish summary . Kehitt. Maatal. — Progressivt Lantbruk , 19 : 11 – 19 .
- Pettersson , A. and Olsson , B. 1966 . Proteinutbytet i animalieproduktionen . Aktuellt fr. Lantbr.högsk. , 92 : 15
- U.N.W.F.C. . United Nations World Food Conference: Assessment of the world food situation, present and future . pp. 125 E/Conf. 65/3