Genre
Electronic books
3,209
Congresses
2,586
Conference papers and proceedings
1,970
Congress
1,495
Periodicals
1,037
Laboratory manuals
888
Periodical
603
Laboratory Manual
472
Handbooks, manuals, etc
422
Laboratory Manuals
353
Biography
336
Handbooks and manuals
315
History
314
Electronic journals
296
congresses
237
Classification
221
Biographies
206
Aufsatzsammlung
180
periodicals
151
Popular works
144
Périodiques
139
Identification
124
Atlases
122
Périodiques
118
Dictionaries
117
Academic theses
116
Handbook
107
Fulltext
105
Examinations, questions, etc
102
Examination Questions
97
Outlines, syllabi, etc
96
Internet Resources
92
Manuels de laboratoire
90
Popular Work
86
Computer network resources
81
Thèses et écrits académiques
78
Atlas
77
Bibliography
74
Textbooks
74
Terminology
73
Examinations
69
Outlines and syllabi
67
Electronic book
66
Congrès
65
Collected Work
59
Abstracts
58
Handbooks
58
Encyclopedias
56
Catalogs
55
Juvenile literature
50
more ...