@article {47471,
	title = {The general science of nitrogen acidification. CASA Science Symposium on nitrogen : Fixed on nitrogen},
	year = {2006},
	pages = {38},
	url = {http://www.casahome.org/wp-content/uploads/2007/07/4-16-Aherne-Science-of-Acidification.pdf},
	author = {Aherne, Julian}
}
