Ritchie, Rob Chemistry / Advanced subsidiary chemistry. AS chemistry. author, Rob Ritchie. - London : Letts Educational, 2000 - 96 p. : ill. ; 30 cm. - AS revision notes . ISBN: 1840855053 (pbk.) Subjects--Topical Terms: Chemistry--Examination--Study guideChemistry. Dewey Class. No.: 540 / RIT