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Subject
- Encyclopedias and dictionaries3
- Booksellers and bookselling2
- Iconographic encyclopaedia of science, literature, and art2
- Bibliography1
- Bilder Atlas zum Conversations Lexicon1
- Bulletin of the United States Geological Survey1
- Fossils1
- Geography1
- Geological surveys1
- Geology1
- Heck, J. G. (Johann Georg), d. 18571
- Names, Geographical1
- Paleontology1
- Publishers and publishing1
- Triangulation1