1. Whey solubles as a source of growth factors in chick rations;Berry;Poultry Sci.,1943
2. The complex nature of the animal protein factor;Carlson;Poultry Sci.,1949
3. Couch, J. R., J. R. Reed Jr., B. L. Reid and J. W. Dieckert, 1952. Distillers solubles and other sources of unidentified factors for promoting the growth of chicks and poults. Proc. 7th Distillers Feed Conference, pp. 59-71.
4. Couch, J. R., J. R. Reed Jr., R. L. Atkinson and B. E. Welch, 1951. Distillers grain solubles and dried whey with an APF concentrate in broiler feeds. Proc. 6th Distillers Feed Conference, pp. 47-55.
5. Couch, J. R., J. R. Reed Jr., R. L. Atkinson, R. W. Perrett, B. E. Welch and J. W. Dieckert, 1954. Distillers dried solubles for growth and hatchability. Proc. 9th Distillers Feed Conference, pp. 38-48.