1. Fertility of deep frozen boar spermatozoa;Crabo;Acta Vet. Scand.,1971
2. Preliminary report on procedure and rationale for freezing boar semen;Graham;A.I. Digest,1971
3. Fertility studies with frozen boar spermatozoa;Graham;A. I. Digest,1971
4. Fertility with frozen boar spermatozoa;Pursel;J. Anim. Sci.,1971
5. Fertilizing capacity of frozen boar spermatozoa;Pursel;J. Anim. Sci.,1971