Langhoff, S R Infrared spectra of substituted polycylic aromatic hydrocarbons. [electronic resource] - The journal of physical chemistry. A Feb 1998 - 1632-46 p. digital Publication Type: Comparative Study; Journal Article ISSN: 1089-5639 Standard No.: 10.1021/jp9731563 doi Subjects--Topical Terms: Acridines--chemistryAnthracenes--analysisCosmic Dust--analysisExtraterrestrial EnvironmentModels, ChemicalPolycyclic Aromatic Hydrocarbons--analysisSpectrophotometry, Infrared