1. Interaction of light with a plant canopy;Allen;J. Opt. Soc. Amer.,1968
2. A land use classification system for use with remote sensor data;Anderson;U.S. Geological Survey Professional Paper,1976
3. A test of cluster sampling in forest inventories;Bonner;Canad. J. Forest Res.,1975
4. Direct solar radiation on various slopes from 0 to 60 degrees north latitude;Buffo,1972
5. Optical reflection properties of natural surfaces;Coulson;J. Geophys. Res.,1965