Harper, F. <br/><br/>
Principles of Arable Crops Production/by  23cm 
Harper F. 
 - usa  University Press, Cambridge  1983 
 - viii.336p.  ill.  23cm 
<br/><br/>includes index 
<br/><br/><label>ISBN: </label>0632053291  FUTML 
<br/><br/><label>Source: </label>B-24525 
<br/><br/><label>LC Class. No.: </label>S613.H37  / H37    1983