DAHLMAN Carl J <br/><br/>
Open field system and beyond. 

 - London  Cambridge university press          1980 
 - viii,234p.  cm. 
<br/><br/><label>ISBN: </label>0 521 22881 6 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X9(J).3.N, M0/TD3