TY  - BOOK
AU  - Rydberg,Per Axel
TI  - Flora of the prairies and plains of cental North America
PY  - 1965///
CY  - New York
PB  - Hafner Publishing Company
KW  - Botany
KW  - North America
KW  - Pteridophyta
KW  - Phanerogams
ER  -