1. The use of intensity-hue-saturation transformations for merging SPOT panchromatic and multispectral image data;Carper;Photogrammetric Engineering and Remote Sensing,1990
2. Extracting spectral contrast in Landsat Thematic Mapper image data using selective Principal Component Analysis;Chavez;Photogrammetric Engineering and Remote Sensing,1989
3. Comparison of three different methods to merge multiresolution and multispectral data: Landsat TM and SPOT panchromatic;Chavez;Photogrammetric Engineering and Remote Sensing,1991
4. Colorado website, ibg www.colorado.edu/~carey/ p7291dir/handouts/princomp.pdf.
5. The Geology of North Singhbhum. Memoir;Dunn,1929