Genre
Periodicals
640
History
227
Newspapers
207
Statistics
130
Maps
98
Conference papers and proceedings
75
Congresses
44
Bibliography
42
Physical maps
30
Directories
28
Topographic maps
28
Electronic books
15
Quadrangle maps
15
Scores
13
Scores and parts
13
Thematic maps
13
Early works to 1800
12
Abstracts
10
Catalogs
10
Fiction
10
Zines
10
Biography
8
Criticism, interpretation, etc
7
Notated music
7
Portraits
7
Chromolithographs
6
Ephemera
6
Geological maps
6
Interviews
6
Personal zines
6
Bibliographies
5
In art
5
Indexes
5
Short stories
5
Sources
5
Charts, diagrams, etc
4
Comic books, strips, etc
4
Digests
4
Early works
4
Observations
4
Poetry
4
Tables
4
Biographies
3
Cases
3
Essays
3
Geological cross-sections
3
Handbooks, manuals, etc
3
Juvenile literature
3
Meteorological charts
3
Military history
3
more ...