DICTIONARY OF ORGANIC COMPOUNDS 17 ENCYCLOPEDIA OF CHEMICAL TECHNOLOGY 16 ELSEVIERS ENCYCLOPAEDIA OF ORGQANIC CHEMISTRY-- SERIES III CARBOISOCYCLIC CONDENSED COMPOUNDS 14 THORPES DICTIONARY OF APPLIED CHEMISTRY 11 ENCYCLOPEDIA OF CHEMICAL REACTION 7 ENCYCLOPAEDIA OF SCIENCE AND TECHNOLOGY 5 HANDBOOK OF CHEMISTRY AND PHYSICS 4 Pure sciences - Dictionaries & encyclopedias 3 ENCYCLOPAEDIA OF CHEMICAL REACTIONS 2 HANDBOOK OF ANALYTICAL TECHNIQUES 2 HANDBOOK OF CHEMICAL ENGINEERING 2 HANDBOOK OF CHEMICAL MICROSCOPY 2 HANDBOOK OF PREPARATIVE INORGANIC CHEMISTRY 2 LANGES HANDBOOK OF CHEMISTRY 2 Science 2 Science Dictionary 2 A COMPREHENSIVE DICTIONARY OF MALAYALAM AND ENGLISH 1 A DICTIONARY OF MALAYAN MEDICINE 1 ADVANCED LEARNERS DICTIONARY 1 CASSELLS GERMAN AND ENGLISH DICTIONARY 1 CHEMICAL ENGINEERS HANDBOOK 1 COMPREHENSIVE DICTIONARY OF PYSICAL CHEMISTRY 1 CONDENSED CHEMICAL DICTIONARY 1 DICTIONARY OF AGRICULTURE 1 DICTIONARY OF PHYSICAL CHEMISTRY 1 DICTIONARY OF SCIENCE 1 ELSEVIERS ENCYCLOPAEDIA OF ORGQANIC CHEMISTRY 1 ENCYCLOPAEDIA OF ORGANIC CHEMISTRY 1 ENCYCLOPAEDIA OF SUBSTITUTES AND SYNTHETICS 1 ENCYCLOPAEDIC DICTIONARY OF ENVIRONMENTAL POLLUTION-- AIR POLLUTION 1