Lockhart, J. A. R. <br/><br/>
Introduction to crop husbandry / 
J. . R. Lockhart and A. J. L. Wiseman. 
 - 4th ed. 
 - Oxford :  Pergamon Press,  1978. 
 - xiii, 302 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0080226531 
<br/><br/><label>LCCN: </label>7730560  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture.<br/>Field crops.<br/>Agriculture--Great Britain.<br/>Field crops--Great Britain.