@book{8403,
	author = {Tinbergen, Niko and Falkus, Hugh},
	title = {Signals for survival},
	publisher = {Clarendon Press},
	year = {1970.},
	address = {Oxford},
	note = {Based on the film "Signals for survival" by Niko Tinbergen and Hugh Falkus, commissioned by the British Broadcasting Corporation.}
}