@book{36005,
	author = {Puerto Rico.},
	title = {Clean air for Puerto Rico},
	publisher = {The Board},
	year = {1972.},
	address = {Santurce, P.R.},
	note = {"This implementation plan is intended to attain clean air for Puerto Rico and to comply with requirements of the U.S. Clean Air Act"--T.p.}
}