Allen, C. F. H. (1951). Six-membered nitrogen compounds with four condensed rings. Interscience.
Chicago Edition CitationAllen, C F H. Six-membered Nitrogen Compounds with Four Condensed Rings. New York: Interscience, 1951.
MLA Edition CitationAllen, C F H. Six-membered Nitrogen Compounds with Four Condensed Rings. Interscience, 1951.
Warning: These citations may not always be 100% accurate.