Genre
- Maps 59 bohtosa
- Congresses 24 bohtosa
- Observations 21 bohtosa
- Periodicals 8 bohtosa
- Surveys 6 bohtosa
- Guidebooks 4 bohtosa
- Bibliography 3 bohtosa
- aps 3 bohtosa
- Bathymetric maps 2 bohtosa
- Handbooks, manuals, etc 2 bohtosa
- Statistics 2 bohtosa
- Aerial photographs 1 bohtosa
- Catalogs and collections 1 bohtosa
- Databases 1 bohtosa
- Indexes 1 bohtosa
- Pictorial works 1 bohtosa
- Remote-sensing images 1 bohtosa
- Sources 1 bohtosa
- Tables 1 bohtosa