Genre
Periodicals
136
Early works to 1800
135
Electronic books
132
Biography
53
Périodiques
53
History
51
Biographies
47
Congresses
36
Laboratory manuals
34
Periodical
32
Problems, exercises, etc
32
Electronic journals
30
Problems and exercises
28
Popular works
27
Conference papers and proceedings
26
Textbooks
26
Miscellanea
19
Computer network resources
17
Handbooks and manuals
16
Handbooks, manuals, etc
15
Trivia and miscellanea
14
Dictionaries
11
Bibliographies
9
Bibliography
8
Festschriften
8
Tables
7
Tables (Data)
7
Zeitschrift
7
Abstracts
5
Academic dissertations
5
Broadsides
5
periodicals
5
Catalogs
4
Criticism, interpretation, etc
4
Juvenile literature
4
Outlines, syllabi, etc
4
Outlines and syllabi
3
Programmed instruction
3
Programmed instructional materials
3
Sources
3
Autobiographies
2
Case studies
2
Correspondence
2
Early works
2
Essays
2
Examinations, questions, etc
2
Fiction
2
Formulae
2
Interviews
2
Libros electronicos
2
more ...