Loosli, John K. <br/><br/>
Nonprotein nitrogen in the nutrition of ruminants /  
J.K. Loosli a nd  I.W. McDonald. 
 - Rome :    Food and Agriculture Organization of the United Nations,    1968. 
 - viii, 94 p. ;    23 cm. 
 - FAO agricultural studies ;    no. 75 .
<br/><br/>Includes bibliographical references (p. 79-94). 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Ruminants -- -- Feeding and feeds.<br/> Feeding.<br/> Urea as feed.