@book{76105,
	author = {Learned, Edmund P. and Copeland, Melvin Thomas,},
	title = {Problems in marketing /},
	publisher = {McGraw-Hill,},
	year = {1936},
	series = {Harvard problem books},
	address = {New York and London :},
	edition = {1st ed},
	note = {"A successor to the fourth edition of Professor Melvin T. Copeland's book of the same title."- Pref}
}