In addition to the community resource people assisting with this project (see How Things Work in Southeastern Pennsylvania Project - Information Page), the following sources were used as references for this project.

PRINTED MATERIALS

Abhau, Marcy editor (and others) Architecture in Education, Philadelphia, PA Foundation for Architecture 1986

Anderson, Lois R. ed. The Stover Mill and How it Ran, Erwinna, PA Tinicum Civic Association, 1976.

Andrews, William editor. Environmental Pollution, Engelwood Cliffs, New Jersey Prentice Hall, Inc. 1972.

Arbor, Marilyn Tools and Trades of America's Past The Mercer Museum Collection, Doylestown, PA The Bucks County Historical Society 1994

Barber, David G. A Guide to the Lehigh Canal Lower and Upper Divisions, North Wales, Pennsylvania , Appalachian Mountain Club 1992.

Bardon, Keith.Exploring Forces and Structures, Austin, Texas Raintree Steck-Vaughn, 1992

Basford, Leslie and Pick, Joan Lighting in Harness ­ Foundations of Electricity, Boston Ginn and Company 1966

Bernstein, Leonard and others Physical Science 2nd ed., New York Globe Book Company, Inc. 1986.

Cooper, Alan Visual Science Electricity , Morrisville, NJ Silver Burdett Company 1985

Cunningham, Robert 200 Years of Bridge History 1794-1994 , Bethlehem, PA August 1994 (no publisher listed for booklet)

Davidson, J. Brownlee Davidson and Chase, Leon Wilson Farm - Machinery Practical Hints for Handy-Men, New York, NY The Lyons Press 1999

Davis, Sharon, P. ed. From Wheat to Flour, Washington, DC Miller's National Federation April 1996

Delaware River Joint Toll Bridge Commission General Information on the Non-Toll Bridges, March 1995. (no author or publisher listed)

Delaware River Joint Toll Bridge Commission General Information on Toll Bridges, June 1996

Historical Highway Bridges in Pennsylvania, Harrisburg, PA Commonwealth of Pennsylvania 1986 (PA Historical & Museum Commission & PA Department of Transportation)

Holtzclaw, Fred and Cronin Jones, Linda and Miller, Steve. Science Explore- Environmental Science, Upper Saddle River, New Jersey Prentice Hall 2000.

Howell, Charles and Keller, Allan The Mill At Philipsburg Manor Upper Mills and A Brief History of Milling, New York Sleepy Hollow Restorations 1977

Kalman, Bobbie Historic Communities, The Gristmill , New York Crabtree Publishing Company1990

K'nex Education Division Bridges Educator Guide, Hatfield, PA 1996

Kuter, Barbara The Stover Mills and Their Millers, Phillipsburg, NJ Graphic Action, Inc. 1999

Macaulay, David The Way Things Work , Boston Houghton Mifflin Company1988

MacReynolds, George. Place Names in Bucks County Pennsylvania: Alphabetically Arranged in an Historical Narrative, 2nd ed. Doylestown, PA. Bucks County Historical Society, 1955.

Marcus, Abraham. Electricity for Electricians, Englewood Cliffs, New Jersey Prentice ­Hall, Inc. 1969.

Metz, Lance E. and Sayenga, Donald. Capt' Shermans's Guide to Hugh Moore Park Easton, Canal History and Technology Press 1998.

Nahum, Andrew Flying Machine Eyewitness Books, London, Dorling Kindersley Limited 1990

Nebel, Bernard J. Environmental Science The Way the World Works, 2nd ed. Englewood Cliffs, New Jersery Prentice Hall, Inc.,1981.

Pelham, David The Penguin Book of Kites , New York: Penguin Books 1976.

Rivinus, Willis M. Delaware and Lehigh National Heritage Corridor , Bethlehem, PA Lehigh River Foundation 1994

Rivinus, Willis M. Guide to the Delaware Canal Along, 60 miles of fun and adventure 7th Ed., 1993 (no publisher listed)

Schiff, Barry Flying, New York Golden Press 1971

Shank, William H. P.E. Pennsylvania Transportation History, A Supplement , York Pennsylvania American Canal and Transportation Center 1990.

Shank, William H. P.E. Three Hundred Years with the Pennsylvania Traveler , York Pennsylvania American Canal and Transportation Center 2000.

Shank, William H. P.E. The Amazing Pennsylvania Canals 166th Anniversary Edition, York, Pennsylvania American Canal and Transportation Center 1981

Simons, Barbara Brooks and Wellnitz, Thomas R. Science Explorer ­ Earth's Water, Upper Saddle River, New Jersey Prentice Hall 2000.

Turk, Jonathan and Turk, Amos. Environmental Science 4th ed., Philadelphia, PA. Saunders College Publishing, 1988.

Smith, Elmer L. Grist Mills of Early America and Today, Lebanon, Pennsylvania Applied Arts Publishers 1978.

van Rossum, Maya K. & Carluccio,Tracy. Stormwater Runoff, Lost Resource or Community Asset, Washington Crossing, PA Delaware Riverkeeper Network, March 2001.

Zacher, Susan M. Covered Bridges of Pennsylvania, A Guide Harrisburg, PA Commonwealth of Pennsylvania 1994

ON LINE SOURCES