L. R. Brannen

Brannen, L. R. (1981). Some practical uses for progestins in livestock management. Dissertation Abstracts International. B, Sciences and Engineering, 42(5), 1766.

BRANNEN, L. R., ULBERG, L. C., & ZIMBELMAN, R. G. (1977). MANAGING REPRODUCTION IN DAIRY-CATTLE .3. CHANGES IN CULLING PATTERNS WITH INCREASED REPRODUCTION. JOURNAL OF DAIRY SCIENCE, 60(7), 1125–1132. https://doi.org/10.3168/jds.S0022-0302(77)83998-2