[Thoma counting chamber with Bürker ruling] [realia] : 6476 / designed by Richard Thoma.
Related Entities
There are 2 Entities related to this resource.
Thoma, Richard, 1847-1923
http://n2t.net/ark:/99166/w6sv0j6w (person)
Carl Zeiss and Company.
http://n2t.net/ark:/99166/w62p1dvw (corporateBody)