Ridgeon, R             F <br/><br/>
Pig management scheme results for 1973  / 
by R. F. Ridgeon 
 - Cambridge  :  Universsity of Cambridge,  1974 
 - 32 p. 
 - .
<br/><br/>  
<br/><br/><label>LCCN: </label>163045 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ganado porcino--Aspectos económicos I. t.