|←Author Index: Sc||Heinrich Schellen
Articles in Popular Science Monthly
- "The August and November Meteors", in Popular Science Monthly Volume 1, August 1872
- "The Constitution of Nebulae", in Popular Science Monthly Volume 3, June 1873
Works by this author published before January 1, 1923 are in the public domain worldwide because the author died at least 100 years ago. Translations or editions published later may be copyrighted. Posthumous works may be copyrighted based on how long they have been published in certain countries and areas.