TY  - BOOK
AU  - Gregorio, Herman C.
AU  - 
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 2
PY  - 1973///.46
CY  - Quezon City
PB  - R.P. Garcia
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - College teaching
N1  - Includes index; 5
ER  -