Genre
Congresses
148,111
Electronic books
135,392
Conference papers and proceedings
106,193
Periodicals
47,983
History
30,868
Biography
22,194
Early works to 1800
21,600
Technical reports
16,054
Congress
14,388
Early works
13,877
Biographies
13,860
Classification
12,749
Dictionaries
11,961
Guidebooks
11,173
Identification
10,813
Pictorial works
10,547
Academic theses
9,096
Handbooks, manuals, etc
8,637
Textbooks
8,269
Juvenile literature
8,260
Laboratory manuals
7,955
Bibliography
7,620
Periodical
7,393
Electronic journals
7,349
Tables
6,999
Handbooks and manuals
6,782
Thèses et écrits académiques
6,719
Field guides
6,427
Congrès
6,423
Problems, exercises, etc
5,931
Popular works
5,442
Observations
5,301
Catalogs
5,187
Atlases
4,668
Maps
4,373
Juvenile works
4,089
Bibliographies
4,001
Problems and exercises
3,783
Festschriften
3,665
Congrès
3,622
Academic Dissertation
3,588
Périodiques
3,488
Laboratory Manual
3,396
Terminology
3,394
Kongress
3,295
Statistics
3,192
dissertations
3,160
doctoral dissertations
3,018
theses
3,018
masters theses
3,016
more ...