"A Manual of the liverworts of West Virginia."; "Ammons, Nelle P. (Nelle Perrel), 1889-"; "Liverworts--West Virginia."; "Ammons, Nelle P. (Nelle Perrel), 1889-"; "1937"; "

Journal article reprint from: University of Pittsburgh Bulletin, v.34:no.1 (1937:Oct.1).

"; ""; "P12351"; "pec"; "Liverworts--West Virginia."; "14256"; .