@book{177,
	author = {edited by Collias, Nicholas E and Collias, Elsie C. and Collias, Nicholas E.},
	title = {External construction by animals /},
	publisher = {Dowden, Hutchinson & Ross ;},
	year = {c1976.},
	series = {Benchmark papers in animal behavior ; v. 4},
	address = {Stroudsburg, Pa. :}
}