The effect of photoperiod on milk production and prolactin in Holstein dairy cows
By: by John M. Marcek.
Published: 1983
Language: eng
Number of pages: 67
Subjects: Milk production.; Lactation.; Photoperiodism.
Notes: Typescript (photocopy).

Thesis (M.S.)--Oregon State University, 1984.

Bibliography: leaves 52-58.