TY  - BOOK
AU  - Allen, Charles Francis Hitchcock ,
TI  - Six-membered heterocyclic nitrogen compounds with three condensed ri ngs
U1  - 547.593 ALL 
PY  - 1958///
CY  - New York
PB  - Interscience Publishers
KW  - Nitrogen compounds
KW  - Heterocyclic compounds
N1  - Includes bibliography
ER  -