http://pec.lib.wvu.edu/record/P178091944The Recognition of the influence of age on butterfat percentage when calculating mature equivalents.Journal article reprint from: <em>Journal of Dairy Science</em>, v.27:no.11 (1944:Nov.).Putnam, Dexter Nevins, 1916-Conklin, C. T.Bowling, G. A. (George Augustus), 1902-Milk yield.Milkfat.Dairy cattle.14256