TY  - BOOK
AU  - Harland,W.Brian
AU  - Armstrong,Richard L.
AU  - Cox,Allen V.
TI  - A geologic time scale 1989
SN  - 0521383617
U1  - 551.707 
PY  - 1982///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Geology
ER  -