00488pamaa2200169 4500 0000031117 20060322090000.0 086462428X 540 CHE 1999 QD33 CHE 1999 CHEMISTRY Two Chris Commons...[et al.]. 3rd ed. Victoria: Heinemann, 1991. vi, 369p.: ill.col.; 28cm. Chemistry -- Juvenile literature Chemistry -- problems, exercises, etc. COMMONS, Chris