English, Peter R. <br/><br/>
The sow-improving her efficiency / 
Peter R. English, William J. Smith, Alastair MacLean. 
 - Suffolk :  Farming Press,  c1977. 
 - 311 pages :  Illustration ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0852360819 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hogs.<br/>Sows.<br/>Swine--Breeding.