30 books
Die Assanierung Von Paris, Issues 1-4...
Handbuch Der Hygiene Volume V. 3
Handbuch Der Hygiene. Supplement Volume 1, Suppl.
Handbuch Der Hygiene, Volume 10
The Coal-Tar Colors; With Especial Reference to Their Injurious Qualities and the Restriction of Their Use
Handbuch Der Hygiene