van Zyl, J G <br/><br/>
Towards a shorter calving interval in South African dairy herds.  [electronic resource] 

 -  Journal of the South African Veterinary Association  Dec 1994 
 - 170-2 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1019-9128 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Anestrus--drug effects<br/>Animal Husbandry--methods<br/>Animals<br/>Cattle<br/>Dairying<br/>Estrus--drug effects<br/>Estrus Detection--veterinary<br/>Female<br/>Pregnancy<br/>Pregnancy, Animal--drug effects<br/>Progesterone Congeners--pharmacology<br/>Time Factors