Saltman, R. L., P. J. Chenoweth, D. O. Rae, P. C. Genho, S. A. Moore, and G. Crosby. 1999. “Effects of an Oral Antibiotic on Fertility in Range Beef Cattle”. The Bovine Practitioner 33 (2):121-23. https://doi.org/10.21423/bovine-vol33no2p121-123.