TY  - BOOK
AU  - National Council of Educational Research and Training(NCERT)
TI  - Rocks unfold the past
U1  - 552 NAT(TB) 
PY  - 1973///
CY  - New Delhi
PB  - National Council of Educational Research and Training(NCERT)
KW  - Earth Sciences (Geology) - Textbook - NCERT
ER  -