TY  - BOOK
AU  - Posthumus,O.
TI  - The ferns of Surinam : and of French and British Guiana
PY  - 1928///
CY  - Malang (Java)
PB  - N. V. Janh'S Drukkerij
KW  - Flora
KW  - Suriname
KW  - Helechos
ER  -