1. SAS User's Guide: Statistics,1985
2. Spektrales Reflexionsverhalten von Fichtenzweigen mit Chlorosen und Nekrosen der Nadeln;Elling;Allg. Forstz.,1986
3. Leaf reflectance of near-infrared;Gausman;Photogramm. Eng.,1974
4. Relation of light reflectance to histological and physical evaluations of cotton leaf maturity;Gausman;Appl. Opt.,1970
5. Large-scale photo assessment of smog damaged pines;Heller,1969