Optical spectroscopic studies of the polymorphic forms of 1, 4-dihydroxyanthraquinone Dutta, Prabir K. ; Lee, B. S. Abstract Publication: Journal of Raman Spectroscopy Pub Date: May 1988 DOI: 10.1002/jrs.1250190306 Bibcode: 1988JRSp...19..175D