Castillo,Dexter D. <br/><br/>
Sea urchin fishery in coastal waters of Ilocos Norte / 
Dexter D. Castillo 
 - Currimao :  MMSU,  2016 
 - xiii, 49 leaves :  color illustration ;  28 cm. 
<br/><br/> UThesis (Bachelor of Science in Marine Biology)<br/><br/>Bibliography : leaves 39-41