TY  - BOOK
AU  - HEILMER,CHARLES H.
AU  - NEAL,CHARLES D.
TI  - PRINCIPLES OF SCIENCE / 
T2  - AMERRILL SCIENCE PROGRAM
SN  - 067507732X
U1  - 375.5 
CY  - نيويورك : 
PB  - CHARLES E. MENILL PUBLISHING COMPANY
KW  - SCIENCE
KW  - CURRICULUM
KW  - SCIENCE - STUDY AND TEACHING
ER  -