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2. IRUG spectral database International Infrared and Raman Users Group http://www.irug.org/search-spectral-database
3. Advocate 1872 Advertisement Thomas Murphy 1 June p. 2.
4. Albury Banner and Wodonga Express 1918 Holbrook 22 March p. 7.
5. Arnold WN 1989 Absinthe Scientific American 260 (June): 112.