Last modified on 15 October 2014, at 12:51

Category:Diatomaceae of Philadelphia

Plates from: The Diatomaceæ of Philadelphia and Vicinity

Author: Charles Sumner Boyer, A.M., F.R.M.S. (1856-1928)

J. B. Lippincott Company, Philadelphia, 1916

Public domain The author died in 1928, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 80 years or less.

This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1923.

This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.