Genre
Maps
342
Periodicals
116
Guidebooks
58
History
56
Early works to 1800
54
Congresses
42
Bathymetric maps
40
Identification
40
Nautical charts
38
Electronic books
34
Statistics
34
Charts, diagrams, etc
33
Conference papers and proceedings
33
Field guides
32
Surveys
28
Technical reports
24
Observations
22
Tables
22
Databases
21
Fiction
21
Pictorial works
21
Biography
19
Lists
17
Legislative hearings
16
Naval history
15
Bibliography
13
Classification
13
Facsimiles
13
Indexes
13
Atlases
12
Booksellers' advertisements
12
Biographies
10
Handbooks, manuals, etc
10
Early works
9
Tables (Data)
9
Directories
8
Graphs
8
Handbooks and manuals
8
Road maps
8
Catalogs
7
CD-ROMs
6
Maps (documents)
6
Anecdotes
5
Bibliographies
5
Diaries
5
Government publications
5
Illustrated works
5
Rapports techniques
5
Thematic maps
5
Travel literature
5
more ...