APA

Olujohungbe A. A., Bryant M. J., Cobby J. M. & Pope G. S. (19981119). Relationships of peri-partum, plasma concentrations of progesterone, oestrogens and 13,14-dihydro-15-ketoprostaglandin F2alpha in heifers and of anatomical measurements of dam and calf with difficulty of calving in early-bred Hereford x Friesian heifers. : Animal reproduction science.

Chicago

Olujohungbe A A, Bryant M J, Cobby J M and Pope G S. 19981119. Relationships of peri-partum, plasma concentrations of progesterone, oestrogens and 13,14-dihydro-15-ketoprostaglandin F2alpha in heifers and of anatomical measurements of dam and calf with difficulty of calving in early-bred Hereford x Friesian heifers. : Animal reproduction science.

Harvard

Olujohungbe A. A., Bryant M. J., Cobby J. M. and Pope G. S. (19981119). Relationships of peri-partum, plasma concentrations of progesterone, oestrogens and 13,14-dihydro-15-ketoprostaglandin F2alpha in heifers and of anatomical measurements of dam and calf with difficulty of calving in early-bred Hereford x Friesian heifers. : Animal reproduction science.

MLA

Olujohungbe A A, Bryant M J, Cobby J M and Pope G S. Relationships of peri-partum, plasma concentrations of progesterone, oestrogens and 13,14-dihydro-15-ketoprostaglandin F2alpha in heifers and of anatomical measurements of dam and calf with difficulty of calving in early-bred Hereford x Friesian heifers. : Animal reproduction science. 19981119.