Plasma levels of vitamin D metabolites in the bovine species during the perinatal period J. P. BARLET, T. Minh NGUYEN, Marie-Jeanne DAVICCO, C. DARDILLAT, J. LEFAIVRE and Michèle GARABEDIANReprod. Nutr. Dévelop., 21 1 (1981) 127-134DOI: https://doi.org/10.1051/rnd:19810111