TY  - BOOK
AU  - Jermy,A.C.
AU  - Crabbe,J.A.
AU  - Thomas,B.A.
TI  - The phylogency and classification of the ferns
SN  - 0123850509 :
U1  - 587.31 
PY  - 1973///
CY  - London
PB  - Academic Press
KW  - Ferns
KW  - Classification
N1  - Includes bibliographical references and index
ER  -