Genre
Electronic books
2,206
Periodicals
834
Congresses
818
Conference papers and proceedings
617
Periodical
497
Congress
349
Laboratory manuals
287
Handbooks, manuals, etc
199
Electronic journals
184
Laboratory Manual
175
Biography
163
History
157
Internet videos
156
periodicals
145
Handbooks and manuals
121
Laboratory Manuals
119
Academic theses
114
Périodiques
104
Biographies
102
Examination Questions
83
Examinations, questions, etc
81
Educational films
77
Périodiques
77
Classification
75
Abstracts
66
Dictionaries
64
Atlases
62
congresses
59
Identification
57
Outlines, syllabi, etc
57
Textbooks
57
Popular works
56
Fulltext
55
Examinations
53
Bibliography
52
Handbook
50
Computer network resources
49
Electronic book
48
Internet Resources
47
Outlines and syllabi
43
examination questions
43
Manuels de laboratoire
40
Video recordings
40
Popular Work
34
Field guides
33
Atlas
32
Outline
30
Outlines
30
Encyclopedias
29
Popular Works
24
more ...