1. Report of the breeding and production organization 1971–72;Anonymous,1973
2. Arizoná herd improvement summaries;Anonymous;January to December,1976
3. Herd CMT performance related to milk produced;Barr;Ohio Herd Improvement Observer,1976
4. Annual summary Dairy Herd Improvement Association 1975–76;Bonewitz,1976
5. The control of mastitis;Brander;Brit. Vet. J.,1972