TY  - BOOK
AU  - Donovan,D.T.
TI  - Stratigraphy: an introduction to principles 
SN  - 0471218006
U1  - 551.7 
PY  - 1966///
CY  - New York
PB  - Wiley-Interscience
KW  - Geology, Stratigraphic
N1  - Includes Bibliography and index
ER  -