TY  - BOOK
AU  - Jens Clausen
TI  - Stages in the evolution of plant species
U1  - 581.38 
PY  - 1962///
CY  - New York
PB  - Hafner Publishing Co
N1  - Jens Clausen: Stages in the evolution of plant species.  New York.  Hafner Publishing Co, 1962.--(581.38CLA)
ER  -