TY  - BOOK
AU  - Dunbar,Carl O.
AU  - Rodgers,John
TI  - Principles of stratigraphy
SN  - 0471225398
U1  - 551.7 First edition
PY  - 1957///
CY  - New York
PB  - Wiley
N1  - S. 319-339: Bibliografi
ER  -