TY  - BOOK
AU  - Ayyar, L. A. N.
AU  - Sudhakara Menon, T.
AU  - Thyagarajan R.
TI  - Indiayile ratnangal
PY  - 1974///
CY  - Thiruvananthapuram
PB  - Kbi
KW  - Geology
KW  - Mineralogy
KW  - Percian Stone
ER  -