The Diatomaceæ of Philadelphia and vicinity, by Charles S. Boyer, illustrated with seven hundred drawings by the author Boyer, Charles S. (Charles Sumner), 1856-1928 creator text book Philadelphia Press of J. B. Lippincott company 1916 1916
print
ENG Botany Fragilariaceae Pennsylvania Philadelphia https://www.biodiversitylibrary.org/bibliography/943 10.5962/bhl.title.943