The philippines recommends for duck egg production. 

 - 1st edition. 
 - Los Banos, Laguna :  PCARRD and LDC,  [2011] 
 - 50 pages :  illustrations ;  23 cm. 
 - Philippines Recommends Series No. 90 .
<br/><br/> References: pages. 41. 
<br/><br/><label>ISBN: </label>9712005186 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Duck egg production.