Vitamin A content similar in yellow or white butterfat
W. A. Regan
California Agriculture 1(7):1-3. DOI: 10.3733/ca.v001n07p1b.
Not available – first paragraph follows:
A conclusion drawn in error some thirty years ago misled the milk consuming public, and the dairymen followed suit.
W. A. Regan is Professor of Animal Husbandry and Animal Husbandman in the Experiment Station. Davis.