Person
Schaefer, G.
Catalogue
- Books
A medical student builds a typewriter / [G. Schaefer].
Schaefer, G.Date: 1941- Books
Physicians as pioneers of air travel / G. Schaefer and W. Naumann.
Schaefer, G.Date: 1941- Books
A seventeenth century doctor builds an economical furnace / [G. Schaefer].
Schaefer, G.Date: 1941- Books
Physicians as builders of optical instruments / G. Schaefer and W. Naumann.
Schaefer, G.Date: 1941- Books
Physicians as inventors of steam engines / G. Schaefer and W. Naumann.
Schaefer, G.Date: 1941