by Badische Anilin- & Soda-Fabrik.
![[William Wheeler Hubbell, authorized to apply for patents.]](https://covers.openlibrary.org/b/id/10200621-M.jpg)
United States. Congress. Senate. Committee on Patents
Kokuritsu Kokkai Toshokan (Japan)
United States. Bureau of the Census
John J. McKetta Jr
J. M. Coulson
American Society for Metals
