TY  - BOOK
AU  - Robert  C. Elderfield
TI  - Heterocyclic compounds. Vol 2 Polycyclic five and six membered compounds containing one O or S atom 
U1  - 547.59 
PY  - 1951///
CY  - New York
PB  - John Wiley & Sons
N1  - Robert  C. Elderfield: Heterocyclic compounds. Vol 2 Polycyclic five and six membered compounds containing one O or S atom.  New York.  John Wiley & Sons, 1951.--(547.59ELD)
ER  -