Citation

Hickson R. E., Lopez-Villalobos N., Kenyon P. R., Morris S. T. (2008) Duration of parturition and frequency of abdominal contractions in primiparous, 2-year-old Angus heifers and the relevance of body dimensions of calves to dystocia. Australian Journal of Experimental Agriculture 48, 935-939.

https://doi.org/10.1071/EA08002