Quantitative reflected light microscopy: A serchable web-based database of the four COM wavelengths. Compliled and edited by C.J. Stanley, Natural History Museum, London. The link to this title remains as it is.
Multispectral (visible and near infra-red, 400-1000 nm range) reflectance data file from common ore minerals. Compiled by R. Castroviejo, J.C. Catalina, H.J. Bernhardt, E. Pirard, C. Brea, L. Pérez-Barnuevo, F. Segubdo and J.A. Espí. Laboratorio de Microscopia Aplicada y Análisis de Imagen, Madrid.