English, Peter R. <br/><br/>
The sow, improving her efficiency / 
Peter R. English, William J. Smith, Alastair MacLean. 
 - 2nd ed. 
 - Ipswich, Suffolk :  Farming Press,  c1982. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label> L.895 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sows.<br/>Swine -- Breeding.--Swine -- Breeding.