Romero, Kathleen Kay D. <br/><br/>
A Preliminary survey on heavy metal contamination of janitor fish (Pterygoplichthys spp.) from selected Barangay of Guagua, Pampanga  [manuscript] / 
Kathleen Kay D. Romero. 
 - Magalang, Pampanga :  Pampanga State Agricultural University,  2015. 
 - 72 pages ;  27 cm.