Allen, C. F. H.  1895- <br/><br/>
Six-membered heterocyclic nitrogen compounds with four condensed rings / 
C. F. H. Allen, in collaboration with D. M. Burness and others. 
 - New York :  Interscience Publishers,  1951. 
 - xiii, 345 p. ;  24 cm. 
 - The Chemistry of heterocyclic compounds  v. 2 .
 - 547.85 .
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Organonitrogen compounds.<br/>Heterocyclic compounds.
<br/><br/><label>Dewey Class. No.: </label>547.85