Prolific sheep 
edited by Mohamed H. Fahmy 
 - Wallingford (United Kingdom)  CAB International  cop. 1996 
 - 542 p.  25 cm 
<br/><br/><label>ISBN: </label>0851989837 
<br/><br/><label>Subjects--Index Terms: </label>Fertilidad Ovinos Produccion animal