TY - BOOK AU - Williams,George Abiah TI - Physical science T2 - Challenges to science SN - 0070704155 AV - Q163 .P577 1979 U1 - 530 PY - 1979/// CY - New York PB - Webster Division, McGraw-Hill KW - Physical sciences KW - Juvenile literature KW - Physics KW - Chemistry N1 - Includes index N2 - A physical science text, stressing an awareness of the environment, with related laboratory activities to lead the student into discovering basic laws and concepts of physics and chemistry ER -