TY  - BOOK
AU  - Simpson,James Charles Edward,1908-1952
TI  - Condensed pyridazine and pyrazine rings (cinnolines, phthalazines, and quinoxalines)
T2  - The Chemistry of heterocyclic compounds, a series of monographs
AV  - QD401 .S59
U1  - 547.1547.8* 
PY  - 1953///
CY  - New York
PB  - Interscience Publishers
KW  - Pyridazine
N1  - Includes bibliographies
ER  -