@book{68938,
	author = {Humphrey, James Harry and Love, Alice M.},
	title = {Principles and techniques of supervision in physical education},
	publisher = {W.C. Brown Co.},
	year = {[1972]},
	address = {Dubuque, Iowa},
	edition = {3d ed.},
	note = {In the earlier editions Irwin's name appeared first on the title-page.}
}