@book{110671,
	author = {Walker, William O.},
	title = {Drug control policy},
	publisher = {Pennsylvania State University Press},
	year = {c1992.},
	series = {Issues in policy history},
	address = {University Park, Pa.},
	note = {"Originally published as a special issue of Journal of policy history (vol. 3, no. 4, 1991)"--T.p. verso.}
}