@article {6106,
	title = {Sensitivity of Sycamore Seedlings (Platanus occidentalis) to Ozone in Great Smoky Mountains National Park Data from 1989},
	year = {1993},
	month = {December},
	institution = {U. S. Department of the Interior, National Park Service},
	keywords = {Air pollution, Ozone, Trees},
	isbn = {Technical Report NPS/NRTR-93/131},
	author = {Neufeld, Howard S and Renfro, James R}
}
