TY  - BOOK
AU  - Shrock, Robert R.
TI  - Sequence in layered rocks; a study of features and structures useful for determining top and bottom or order of sucession in beddeb and tabular rock bodies 
U1  - 551.5 
PY  - 1948///
CY  - New York
PB  - McGraw Hill 
KW  - Earth Sciences
ER  -