TY  - BOOK
AU  - Donovan,D.T.
TI  - Stratigraphy / 
U1  - 551.7 DON 
PY  - 1966///
CY  - London : 
PB  - Thomas Murby and co., 
KW  - Geology, Stratigraphy
KW  - Fossils
KW  - Lithological variation
N1  - Includes index
ER  -