@article {12356,
	title = {On a Clear Day},
	journal = {National Parks},
	volume = {71},
	year = {1997},
	month = {November/December},
	pages = {26-29},
	keywords = {Air pollution, Air quality, Pollution},
	url = {http://books.google.com/books?id=YYsOv0phfVAC\&pg=PA26\&dq=national+parks+magazines\&source=gbs_toc_r\&cad=2$\#$v=onepage\&q\&f=false},
	author = {Tennesen, Michael}
}
