@book{21911, author = {Cox,Michael C}, title = {A- level and AS- level :}, publisher = {Longman Group UK Limited,}, year = {1990}, address = {England :}, note = {A revision book for A-level, AS-level and Higher Grade chemistry. The guide contains information on how to study and revise effectively and questions with answers that show typical mistakes, weaknesses of approach and desirable features.} }