TY  - JOUR 
T1  - The Ferns of Brazilian Amazonia
JO  - Acta Amazonica
A1  - Tryon, Rolla M.
A1  - Conant, David S.
SN  - 0044-5967
UL  - 10.1590/1809-43921975051023
VL  - 5 
Y1  - 1975
PB  - Brasil 
ER  -