1. Ainslie's Complete Guide to Thoroughbred Racing;Ainslie,1988
2. The oldest pedigree chart;Amschler;J. Heredity,1935
3. Progress in horse breeding;Anderson;J. Heredity,1921
4. Horse breeding;Arnason,1998
5. A contribution on the evaluation of performance tests in Thoroughbred breeding with special reference to the racing performance of individual stallion progeny groups;Artz;Giessen. ScheReihe Tierz. Haustiergenet.,1961