American Association of Bovine Practitioners, . 1990. Twenty-Third Annual Conference of the American Association of Bovine Practitioners and International Mastitis Symposium, National Mastitis Council: Indianapolis, Indiana, September 13-16, 1990. The Bovine Practitioner. 25 (Sep. 1990), i-xxxii. DOI:https://doi.org/10.21423/bovine-vol0no25pi-xxxii.