TY  - BOOK
AU  - Weller, J. Marvin
TI  - Stratigraphic principles and practice
T2  - Harper's geoscience series
U1  - 551.7 
PY  - 1960///
CY  - New Delhi 
PB  - Universal Book Stall
KW  - Stratigraphy and time
KW  - Development of Stratigraphy
N1  - Includes bibliographical references and index
ER  -