TY  - BOOK
AU  - Custodio, Emelita S.
TI  - English proficiency in usage & grammar
SN  - 978-971-821-238-7
AV  - FIL PE 1065 
CY  - Malabon City
KW  - English language -- Grammar and composition.
KW  - English language -- Usage
N1  - Includes bibliographical references
ER  -