%0 Journal Article %T The effect of size and type upon the efficiency of milk and beef production in cattle %A A Horn %A S Boz¨® %A A Dunay %J Genetics Selection Evolution %D 1971 %I BioMed Central %R 10.1186/1297-9686-3-1-71 %U http://www.gsejournal.org/content/3/1/71