TY  - BOOK
AU  - Cody, William J.
AU  - Britton, Donald M.
TI  - Ferns and fern allies of Canada
U1  - 587.31 
PY  - 1989///
CY  - Ottawa
PB  - Minister of Supply and Services
KW  - Botánica
KW  - Canadá
KW  - Helechos
ER  -