@book{32477,
	author = {Nielsen, U. and Aldred, A. H.},
	title = {New developments for tropical surveys prove successful.},
	publisher = {Forest Management Institute,},
	year = {(1978?).},
	address = {Ottawa :},
	note = {Ponencia presentada en : International symposium on Remote Sensing for Observation and Inventary of Earth Resources and the Endangered Envirenment. Freiburg, Alemania, 1978}
}