SUBJECT
Science
Technology
81
History
75
Scientists
25
Research
24
Philosophy
22
Engineering
19
Sciences
16
Mathematics
13
Social aspects
13
Societies, etc
12
Study and teaching
12
Methodology
11
Physics
11
Science and state
10
Civilization
8
Juvenile literature
8
Science and civilization
6
Statistical methods
5
Annuaires
4
Bibliography
4
Biography
4
Children's question and answer
4
Data processing
4
Encyclopedias
4
Experiments
4
International cooperation
4
Science -- History
4
Study and teaching (Higher)
4
Study and teaching (Secondary)
4
Agriculture
3
Information services
3
Language
3
Matter
3
Medicine
3
Miscellanea
3
Research Personnel
3
Social sciences
3
Statistics
3
Technology and state
3
Universities and colleges
3
Astronomy
2
Biology
2
Chemistry
2
Collected works. [from old catalog]
2
Developing countries
2
Dictionaries
2
Directories
2
Discoveries in geography
2
Economics
2
more ...