Bullard, R. K. First steps in remote sensing / R. K. Bullard and P. J. Lakin - London : North East London Polytechnic, 1981 - 61 p. : ill. ; 30 cm. - Working paper (North East London Polytechnic. Department of Land Surveying) no.3 . ISBN: 0907382029 Subjects--Topical Terms: Remote sensing