Remote sensing and resource exploration : proceedings of the First International Workshop on Remote Sensing and Resource Exploration, ICTP (Trieste, Italy) 9Feb - 6 Mac 1987 / by International Workshop on Remote Sensing and Resources exploration (1st : 1987 : ICTP Trieste, Italy), El-Baz, Farouk, Mohamed H. A. Hassan, Cappellini, Vito, International Center for Theoretical Physics (ICTP)