A working key to the genera of North American Algae. Pub. by the Charles Hyde Olmstead FundFrank S. Collins · First published 1918Open the Tome
New species, etc. issued in the Phycotheca boreali-americanaFrank S. Collins · First published 1908Open the Tome
Ulothricaceae and Chaetophoraceae of the United StatesFrank S. Collins · First published 1903Open the Tome