1. Some practical applications of multiband spectral reconnaissance;Colwell;Am. Scientist,1961
2. Uses and limitations of multispectral remote sensing;Colwell,1966
3. A multispectral photographic experiment based on a statistical analysis of spectrometric data;Colwell,1965
4. A multispectral photographic experiment based on a statistical analysis of spectrometric data;Colwell,1966
5. The interpretability of high altitude multispectral imagery for the evaluation of wildland resources;Draeger,1967