TY  - BOOK
AU  - Bharadwaj,D.C.
AU  - Tiwari,R.S.
TI  - Sporological correlation of coalseams in bachra area of North Karanpura coalfield Bihar,India
PY  - 1966///
PB  - The Palaeobotanist,Vol.15(1-2),1-10pp.
ER  -