1. Clark, R.N., T.V.V. King, C. Ager, and G.A. Swayze. 1995. Initial vegetation species and senescence/stress mapping in the San Luis Valley, Colorado using imaging spectrometer data. InProceedings: Summitville Forum '95, edited by H.H.Posey, J.A. Pendelton, and D. Van Zyl, 64-69. Colorado Geological Survey Special Publication 38.
2. Freeman, T. 1996. What is Imaging Radar? Accessed 23, 2011. http://southport.jpl.nasa.gov/