@book{94646,
	author = {Harbeck, Mary Blatt.},
	title = {A sourcebook for science supervisors.},
	publisher = {National Science Supervisors Association, A Section of the National Science Teachers Association},
	year = {[1967]},
	address = {Washington},
	note = {Later ed. (c1976) entered under title: 2nd sourcebook for science supervisors.}
}