TY  - GEN
AU  -  Williams, George A.
AU  - Williams,George Abiah
TI  -  Physical science
T2  - Challenges to science
SN  - 0070704155
U1  - 500.2,WIL 
PY  - 1979///
CY  - New York
PB  - Webster Division, McGraw-Hill
KW  - Chemistry
KW  - Physical sciences
KW  - Juvenile literature
KW  - Physics
N1  - Physical Science (Page-1), Motion And Energy (Page-18), Heat And Energy (Page-95), Matter And Energy (Page-173), Electricity And Magnetism (Page-295), Sound And Light (Page-367), Nuclear Science (Page-417)
ER  -