Bibliography
Holtzberg-Call, Maggie. The Lost World of the Craft Printer (Urbana and Chicago: University of Illinois Press, 1992). http://lccn.loc.gov/90024004.
Cohen, Michael J., 1929-. Our classroom is wild America; trailside education in action-encounters with self, society, and nature in America's first ecology expedition school (Jericho, N.Y., Exposition Press, 1974). http://lccn.loc.gov/74076019.