@book{15857,
	author = {Boyd, Harper W. and Westfall, Ralph and Westfall, Ralph ; jt. auth.},
	title = {Marketing research; text and cases},
	publisher = {Irwin},
	year = {1972},
	address = {Illinois},
	edition = {3rd},
	note = {"First edition published in 1956 and 4th ed. published in 1977 ; xii, 692p."}
}