TY  - BOOK
AU  -  Seward,A.C.
TI  -  Plant life through the ages : :  a geological and botanical retrospe ct / 
U1  -  561 SEW 
PY  - 1931///
CY  -  Cambridge [Eng.] : 
PB  -  The University Press, 
KW  -  Paleobotany
KW  -  Geology
N1  -  Includes bibliographical references (p. 545-583)
ER  -