Garratt , John A question of chemistry : creative problems for critical thinkers / John Garratt , Tina Overton and Terry Threlfall. - Singapore : Longman , 1999 - xii , 162 p. : ill. ; 24 cm. Includes index. ISBN: 0582298385 RM84.38 Subjects--Topical Terms: Chemistry--Questions and answers National Library of Medicine Call No.: QD18