Urea, its characteristics and efficient use as fertilizer in Japan   (Book) 

 - Tokyo  Urea Research Organization of Japan Ammoium Sulphate Industry  1968 
 - 106 p.  26 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers and manures Urea as fertilizer
<br/><br/><label>Universal Decimal Class. No.: </label>631.841.7 (520) URE  / 8428