Sahagun, John Joseph S. <br/><br/>
The Use of Cassava (Manihot esculenta) and Sweet Potato (Ipomoea batatas) In Making Gravy  [manuscript] / 
John Joseph S. Sahagun. 
 - Magalang, Pampanga :  Pampanga State Agricultural University,  2018. 
 - xii; 51 leaves + CD ;  28 cm.