TY  - BOOK
AU  - Gregorio,Herman C.
AU  - Gregorio,Cornelia M.
TI  - Principles of elementary secondary education
U1  - 370 
PY  - 1989///
CY  - Quezon City
PB  - R.P. Garcia
KW  - Education
KW  - Education, Elementary
KW  - Education, Secondary
N1  - 300-399; 370
ER  -