Simpson, James Charles Edward,  1908-1952. <br/><br/>
Condensed pyridazine and pyrazine rings / 
James Charles Edward,Si mpson 
 - New York :  Interscience Publishers ,  1953. 
 - 394 p. :  ill. ;  24 cm. 
 - The Chemistry of heterocyclic compounds. a series of monographs. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pyridazine.
<br/><br/><label>Dewey Class. No.: </label>547.593