ENSMINGER M.E., J.E. Olfield ...
Published by Morgan Mc Millan, Aurecon - Civil Engineer
ENSMINGER M.E., J.E. Olfield and W.W. Heinemann 1990. Feeds and Nutrition, 2nd Edition. The Ensminger Publishing Co., California, 95-239. http://ianrpubs.unl.edu/live/g2060/build/g2060.pdf