by Ernst Hefti , Mathis Berger , W. Stauffacher
![[William Wheeler Hubbell, authorized to apply for patents.]](https://covers.openlibrary.org/b/id/10200621-M.jpg)
United States. Congress. Senate. Committee on Patents
Canada. Parliament. House of Commons.
France
United States
Susanne Katherina (Knauth) Langer
Dr. Seuss
