SUBJECT
Chemistry
Laboratory manuals
85
Study and teaching
81
Experiments
77
Physics
73
Study and teaching (Secondary)
58
Problems, exercises, etc
48
Biochemistry
40
Chemistry, Organic
30
History
26
Textbooks
24
Dictionaries
22
Mathematics
18
Science
18
Chemistry, Analytic
17
Study and teaching (Higher)
17
Outlines, syllabi, etc
15
Tables
14
Data processing
13
Examinations, questions, etc
12
Programmed instruction
12
Qualitative
12
Chemistry, Physical and theoretical
10
Chemists
9
Examinations
9
Juvenile literature
9
Medicine
9
Physical sciences
9
Biology
8
Research
8
Tables, etc
7
Advanced placement programs (Education)
6
Chemical reactions
6
Chemistry, Inorganic
6
College entrance achievement tests
6
Congresses
6
Encyclopedias
6
English
6
Study and teaching (Elementary)
5
Activity programs
4
Biological chemistry
4
Chemistry, Technical
4
Dictionaries, Polyglot
4
Earth sciences
4
Entrance examinations
4
Handbooks, manuals, etc
4
Laboratory manual
4
Molecular theory
4
Notation
4
Problems and exercises, calculations, examinations, questions, etc
4
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