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2. Some nutrition effects on birth weight and calving difficulty and relationships of feeding time and calving;Bellows,1981
3. Influence de la photoperiode ou des conditions de milieu sur la parturition;Bosc,1980
4. Hourly distribution of time of parturition in the domestic goat;Bosc;Theriogenology,1988
5. A note on the relationship between barometric pressure and calving incidence;Dvorak;Anim. Reprod. Sci.,1978