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Archived from http://www.antioch-college.edu/glenhelen/Newsletters/Documents/Spring05InTheGlen.pdf via the Internet Archive Wayback Machine (captured 2006-09-01).
In the Glen | Spring 2005 | Glen Helen Ecology Institute 1 by Bob Parker Glen Helen in Yellow Springs has been blessed with extensive limestone deposits, which have been commercially exploited from the years of early settlement until the third and fourth decades of the 1900s. Early quarries provided stone for construction and building in the area probably including early hotel and coll…