1. J. P. Maule, The Semen of Animal and Artificial Insemination. Commonwealth Agr. Bureaux, England, 1962.
2. P. H. Phillips and H. A. Lardy, J. Dairy Sci.23, 399 (1940).
3. P. Bhattachara, in J. P. Maule.
4. D. R. Gokhale, Indian vet. J.35, 97 (1958).
5. C. K. Rao, Indian vet. J.35, 97 (1958).