TY  - BOOK
AU  - Gregorio, Herman C.
AU  - Gregorio,Cornelia M.
TI  - Principles of elementary-secondary education
PY  - 1989///
CY  - Quezon City
PB  - R.P. Garcia Publishing Company, Incorporation
KW  - Education
KW  - sears
N1  - Includes index
ER  -