Briggs, David J. <br/><br/>
Agriculture and environment :  the physical geography of temperate agricultural systems / 
David J. Briggs, Frank M. courtney. 
 - Harlow :  Longman,  1993. 
 - xiv, 442 p. :  ill. ;  25 cm. 
<br/><br/>Includes bib. references and index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0582004136 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural ecology.<br/>Agriculture.