TY  - BOOK
AU  - Derberg, Hellis
AU  - 
TI  - International stratigraphic guide: A guide to stratigraphic classification, terminology and procedure
U1  - 551.7 
PY  - 1976///
CY  - New York
PB  - Wiley Eastern
KW  - Stratigraphy
KW  - classification
KW  - terminology
ER  -