McVivkar, M.H. Walker, W.M. <br/><br/>
Using commercial fertilizers  Commercial fertilizers and crop production 

 -  1978 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Fertilizer<br/>Crops production
<br/><br/><label>Dewey Class. No.: </label>631.81  / M25U