Johnson, M.H, Everitt, B.J <br/><br/>
Essential production 
Martin H. Johnson, Barry J. Everitt 
 - Oxford  Blackwell  1980 
 - xi, 366p.:  ill,Pbk,: 
<br/><br/><label>ISBN: </label>0632005270 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mammals --reproduction