TY  - BOOK
AU  - Schoch R M Au.
TI  - Stratigraphy: Principles and methods SCHOCH
U1  - H5, M9 
PY  - 1989///
CY  - New York 
PB  - Van Nostrand reinhold    
KW  - Biostratigraphy and Magnetostratigraphy
ER  -