Chew, 1993. J. Anim. Sci., 71: 247-252 Document reference Chew, B. P., 1993. Effects of supplemental beta-carotene and vitamin A on reproduction in swine. J. Anim. Sci., 71: 247-252Web http://www.journalofanimalscience.org/content/71/1/247Citation key Chew, 1993Datasheets Alfalfa (Medicago sativa)
