TY  - BOOK
AU  - Conkin B M Ed.
AU  -  Conkin J E Ed.
TI  - Stratigraphy: foundations and concepts
T2  - Benchmark papers in geology series
U1  - H5z7, M4 
PY  - 1984///
CY  - New York    
PB  -  Van nostrand       
KW  -  Stratigraphy
KW  - Geology
ER  -