References
- Jensen , John , Campbell , James , Dozier , Jeff , Estes , Jack , Hodgson , Michael , Lo , C.P. , Lulla , Kamlesh , Merchant , James , Smith , Ray , Stow , Doug , Strahler , Alan and Welch , Roy . 1989 . Remote Sensing in Geography in America , Edited by: Galle , G. and Willmott , C. 746 – 775 . Columbus, Ohio , , USA : Merrill Publishing Company . (1989)