@article {6117,
	title = {To Move a Mountain---And Make a Window},
	journal = {The Regional Review},
	volume = {2},
	year = {1939},
	month = {January},
	pages = {13-15},
	keywords = {Geology, Slate},
	url = {http://www.cr.nps.gov/history/online_books/regional_review/vol2-1d.htm},
	author = {H. S Ladd}
}
