TY  - BOOK
AU  - Weller J Marvin
TI  - Stratigraphic principles and practice
T2  - Harper's geoscience series
U1  - H5, K02;2-;4-;5-;7-;9-;11 
PY  - 1960///
KW  -  Stratigraphy
KW  - Geology
ER  -