Spectroscopy: Ramen

Adema, Kees “Holland’s Track-Boat Markings: A Philatelic Conundrum Solved,” The Collectors Club Philatelist, Vol. 87, No. 5, September-October 2008, pp. 291-302.
Chaplin, T.D., Jurado-Lopez, A., Clark, R.J.H., and Beech, D.R. “Identification by Raman microscopy of pigments on early postage stamps: distinction between original 1847 and 1852-1862, forged and reproduction postage stamps of Mauritius,” Journal of Raman Spectroscopy, Vol. 35, 2004, pp. 600-604.