1. “Inovulation”: a film made and held by the Film Unit of the Institute of Animal Genetics, Edinburgh (1951).
2. Snell, G. D., Hummel, K. P., and Abelmann, W. H., Anat. Rec., 90, 243 (1944).
3. Fekete, E., and Little, C. C., Cancer Res., 2, 525 (1942).