@book{17914,
	author = {Tugwell, Rexford G. and University of Puerto Rico Rio Piedras campus},
	title = {Tugwell's Thoughts on planning},
	publisher = {University of Puerto Rico Press},
	year = {1975.},
	address = {[Río Piedras?]},
	note = {At head of title: Graduate School of Planning, University of Puerto Rico.}
}