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Gravert H. O., 1979, Calving problems and early viability of the calf. A seminar in the EEC programme of coordination of research on beef production held at Freising, Federal Republic of Germany, May 4-6, 1977., P338
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Hoffmann B., 1979, Calving problems and early viability of the calf. A seminar in the EEC programme of coordination of research on beef production held at Freising, Federal Republic of Germany, May 4-6, 1977., P263
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MCDIARMID SC, 1980, NZ VET J, V28, P61
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MCDIARMID SC, 1979, NZ VET J, V27, P86