TY - JOUR T1 - Anatomical light microscopic features of the down feathers of four species of cockatoos (Aves Psittaciformes: Psittacidae) JF - The Philippine Journal of Veterinary Medicine A1 - Panganiban, Marie-Louise G. A2 - Lastica-Ternura, Emilia A. A2 - Flores, Marianne Leila S. LA - English YR - 2022 UL - https://tuklas.up.edu.ph/Record/IPP-00000657221 KW - Feathers KW - Birds KW - Feather morphology ER -