Washington,Govt. Print. Off.,1922. | New York Botanical Garden, LuEsther T. Mertz Library

1929 publication by Maryland Geological Survey

Baltimore, The John Hopkins Press, 1922.

New York,1903. | New York Botanical Garden, LuEsther T. Mertz Library

article by Edward Wilber Berry published in Creation by Evolution, 1928

Washington,Govt. Print. Off.,1922. | New York Botanical Garden, LuEsther T. Mertz Library

Washington, Govt. Print. Off., 1922.

Trenton, N.J.,MacCrellish & Quigley, printers,1911. | New York Botanical Garden, LuEsther T. Mertz Library

Washington,Govt. print. off.,1922. | New York Botanical Garden, LuEsther T. Mertz Library

Baltimore: The Johns Hopkins Press, 1922.

Washington,Govt. Print. Off.,1916. | New York Botanical Garden, LuEsther T. Mertz Library

written work by Edward W. Berry

Washington,Govt. print. off.,1916. | New York Botanical Garden, LuEsther T. Mertz Library

Washington,Govt. Print. Off.,1916. | New York Botanical Garden, LuEsther T. Mertz Library

Charlottesville: University of Virginia, 1912.

Baltimore, Williams & Wilkins, 1923.

volume 6 (in two parts) of the book series Maryland geological survey