1. Egg transfer: historical aspects;Adams,1982
2. A commemoration of the fiftieth anniversary of the first recovery of a bovine embryo;Betteridge;Bovine Practitioner,1980
3. An historical look at embryo transfer;Betteridge;J Reprod Fertil,1981
4. The transplantation of living nuclei from blastula cells into enucleated frogs' eggs;Briggs,1952
5. Finding the egg. Two million calves in a thimble;Buchanan;The Ayrshire Cattle Society's Journal,1932