TY  - BOOK
T1  - Time drill :an introduction to geologic time /
DA  - 1995.
CY  - [Menlo Park, CA] :
AU  - Purcell, Kevin P.
VL  - 95-805A
CN  - I 19.76:
PB  - U.S. Dept. of the Interior, U.S. Geological Survey,
PP  - [Menlo Park, CA] :
PY  - 1995.
N1  - Also available as floppy disk designed for Macintosh computers.
ID  - 220074
KW  - Geological time
TI  - Time drill :an introduction to geologic time /
ER  -