Author:Albert David Hager
|←Author Index: Ha||Albert David Hager
|United States geologist, librarian and historian|
- “Trumbull, Benjamin,” Appletons' Cyclopædia of American Biography. New York: D. Appleton and Co., 1900. (section on Lyman Trumbull)
- “Hager, Albert David,” Appletons' Cyclopædia of American Biography. New York: D. Appleton and Co., 1892.
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.