@article {42617,
	title = {How warm was the Medieval warm period?},
	volume = {29},
	year = {2000},
	pages = {51-54},
	publisher = {Ambio},
	url = {http://ambio.allenpress.com/archive/0044-7447/29/1/pdf/i0044-7447-29-1-51.pdf},
	author = {Crowley, Thomas J. and Lowrey S.}
}
