|←Author Index: Bo||Helene Bonfort
Articles in Popular Science Monthly
- 1. "Sketch of Heinrich Hertz", in Popular Science Monthly Volume 45, July 1894
- 2. "Wellner's Sail-Wheel Flying Machine", in Popular Science Monthly Volume 46, March 1895
Some or all works by this author are in the public domain in the United States because they were published before January 1, 1923.
The author died in 1940, so works by this author are also in the public domain in countries and areas where the copyright term is the author's life plus 70 years or less. Works by this author may also be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.