Bumanglag, Jenina Camille G. <br/><br/>
Vermi-organic fertilizer production as a supplemental source of income of farmers in the City of Batac, Ilocos Norte / 
Jenina Camille G. Bumanglag 
 - City of Batac :  MMSU,  2019. 
 - xii, 44 leaves :  28 cm. 
<br/><br/> Thesis (BS in Agriculture major in Agriculture Extension)  -- Mariano Marcos State University-College of Agriculture, Food and Sustainable Development, Batac City  
<br/><br/>Bibliography: leaf 34