Genre
Private bills
34,599
Electronic books
6,555
Messages
470
Periodicals
338
Case studies
320
Handbooks, manuals, etc
230
Congresses
201
Resolutions
201
Biography
148
Cross-cultural studies
127
History
122
Treaties
122
Statistics
80
Rules and practice
71
Encyclopedias
42
Juvenile literature
41
Databases
39
Longitudinal studies
38
Online resources
36
Study guides
36
Biographies
35
Directories
35
Handbooks and manuals
31
Conference papers and proceedings
24
Software
21
Interviews
19
Guides, manuels, etc
18
Academic theses
16
Electronic journals
16
Problems, exercises, etc
15
Juvenile software
13
Registers
13
Anecdotes
11
Bibliography
11
Early works to 1800
11
Études de cas
11
Interactive multimedia
11
Sources
10
Controversial literature
9
Pictorial works
9
Juvenile works
8
Life skills guides
8
Problems and exercises
8
Downloadable audio file
7
Maps
7
Records and correspondence
7
Textbooks
7
Dictionaries
6
Documentary television programs
6
Examinations
6
more ...