Spedding, Colin Raymond Willian. <br/><br/>
Vegetable productivity 

 - London :  MacMillan,  1981 
 - 268 p.  ; gráfs. 
<br/><br/><label>LCCN: </label>57795 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Horticultura.
<br/><br/><label>Dewey Class. No.: </label>635  / S64