Genre
Congresses
502
Congress
423
Conference papers and proceedings
390
Electronic books
194
Periodicals
159
Educational films
148
Internet videos
145
Periodical
120
congresses
113
History
64
Electronic journals
40
Biography
38
periodicals
31
Périodiques
28
Computer network resources
25
Biographies
24
Examination Questions
23
Examinations, questions, etc
23
Dictionaries
22
Early works to 1800
19
Périodiques
19
Collected Work
18
Popular works
17
Case studies
16
Festschriften
16
Atlases
15
Aufsatzsammlung
15
Bibliography
15
Essay
15
Early works
14
Essays
14
Internet Resources
14
Textbooks
14
Collected Works
13
Examinations
13
Laboratory manuals
13
Congrès
12
Fulltext
12
Outlines, syllabi, etc
12
Academic theses
11
Film excerpts
11
Handbooks, manuals, etc
11
Video recordings
11
Video recording
10
Laboratory Manuals
9
Outlines and syllabi
9
Popular Work
9
Abstracts
8
Bibliographies
8
CD-ROMs
8
more ...