Genre
Maps
251
Geological maps
29
Guidebooks
15
Bibliography
11
Periodicals
8
Topographic maps
7
Cartes
4
Geographic information systems data
3
Annual reports
2
Conference papers and proceedings
2
Electronic books
2
Cartes géographiques
1
Cartes géologiques
1
Congresses
1
Engravings
1
Facsimiles
1
Geographic information systems software
1
Geological cross-sections
1
Quadrangle maps
1
Wood engravings
1
geological maps
1