TY  - BOOK
TI  - Heterocyclic compounds: edited by Robert C. Elderfield
U1  - 547.59 
PY  - 1961///
CY  - New York
PB  - John Wiley
N1  - Contents: Polycyclic compounds rings five and six membered heterocycles containing three hetero atoms and their benzo derivatives. Elderfield, Robert C
ER  -