TY  - BOOK
AU  - Hedberg,Hollis Dow
TI  - International stratigraphic guide: a guide to stratigraphic classification, terminology, and procedure 
SN  - 0471367435
U1  - 551.7 23
PY  - 1976///
CY  - New York
PB  - Wiley
KW  - Geology, Stratigraphic
N1  - Includes index and bibliography
ER  -