1. Color photo comparison;Anson;Photogrammetric Engineerin,1966
2. The application of optical filtering in coherent light to the study of aerial photographs of Greenland glaciers;Bauer;Journal of Glaciolog,1967
3. Fischer , W. A. 1960 Spectral reflectance measurements as a basis for film-filter selection for photographic differentiation of rock units U.S. Geological Surrey Professional Paper 136 138
4. Colour aerial photography in geologic investigations;Fischer;Photogrammetric Engineerin,1962