English, Peter R. <br/><br/>
The sow, improving her efficiency 
Peter R. English, William J. Smith, Alastair MacLean 
 - Ipswich  Farming Press  1977 
 - 311 p.  ill., form  23cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sows
<br/><br/><label>Dewey Class. No.: </label>636.4  / 08