Hills, Lawrence D. <br/><br/>
Fertility without fertilizers :  a basic approach to organic gardening / 
Lawrence D. Hills 
 - New York :  Universe Books,  1977 
 - 131 p. :  ill. ;  21 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>0876632797 
<br/><br/><label>LCCN: </label>76-041661 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Organic gardening