Genre
Congresses
26,623
Conference papers and proceedings
18,945
Electronic books
16,773
Technical reports
12,393
Periodicals
5,982
History
4,227
Biography
3,739
Early works to 1800
2,498
Biographies
2,465
Observations
2,065
Tables
1,856
Early works
1,745
Dictionaries
1,399
Textbooks
1,236
Handbooks, manuals, etc
1,143
Academic theses
1,066
Bibliography
1,001
Handbooks and manuals
954
Early works to 1850
948
Popular works
937
Problems, exercises, etc
905
Statistics
883
Electronic journals
759
Thèses et écrits académiques
721
Juvenile literature
699
Tables (Data)
675
Problems and exercises
646
Festschriften
641
Charts, diagrams, etc
621
Congrès
581
Congrès
573
Bibliographies
542
Laboratory manuals
542
dissertations
361
Périodiques
359
Electronic book
358
doctoral dissertations
350
masters theses
350
theses
350
Academic Dissertation
341
Congress
341
Periodical
332
Catalogs
316
Périodiques
290
Directories
287
Video recordings
270
Correspondence
267
Databases
248
Juvenile works
247
Kongress
246
more ...