TY  - BOOK
AU  - Marean,John H.
AU  - Ledbetter,Elaine W.
TI  - Physical science, a laboratory approach : : investigating matter an d energy  / 
U1  - 530.15 MAR 
PY  - 1968///
CY  - Menlo Park : 
PB  - Addison-Wesley, 
KW  - Physical science
KW  - Study and teaching
ER  -