Studies of Tropical American Ferns. No. 6. By William R. Maxon William Ralph Maxon Published: 1916 Total Pages: 96 Get eBook
Studies of Tropical American Ferns. No. 4. By William R. Maxon William Ralph Maxon Published: 1913 Total Pages: 72 Get eBook
Report on the Progress and Condition of the U.S. National Museum for the Year Ending June 30 ... United States National Museum Published: 1917 Total Pages: 236 Get eBook
Report of the Assistant Director and of the Curators of the U.S. National Museum United States National Museum Published: 1909 Total Pages: 158 Get eBook
