1. Austin, C. R., and M. W. H. Bishop, 1957. Preliminaries to fertilization in mammals. Beginnings of Embryonic Development. American Association for the Advancement of Science, 1515 Massachusetts Ave. N.W., Washington 5, D.C.
2. Some aspects of the dilution effect in bovine spermatozoa;Bishop;Proc. Soc. Stud. Fertil.,1954
3. Bonnier, G., and S. Trulsson, 1939. Artificial insemination of chickens with semen diluted in Ringer solution. 7th. World's Poultry Cong.: 76-79.
4. A note on a collection apparatus for avian semen;Copper;Vet. Rec.,1955
5. Unpublished data. Cooper, D. M., and J. G. Rowell, 1957. Laboratory prediction of the fertilizing capacity of cock semen;Cooper;Poultry Sci.,1955