Havens, Douglas Frederick. <br/><br/>
The components of a successful vegetable gardening program :  a guide for operational planning / 
Douglas Frederick Havens. 
 - Loma Linda :  University Press,  1977. 
 - iii, 29 p. ;  29 cm. 
<br/><br/> Open access. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vegetable gardening.