Special thanks to my subscribers :
Deborah Crawford at
Sci Tech High School in Harrisburg PA
Ira Spector at Broward College in Boca
Raton Fl
Linda Hendersen at the Distance Education department for the North Carolina School
of Science & Math
Rokhaya Niang Saint Louis Community College- Florissant Valley.
Brian Salerno Elliot City, Maryland
Mary Holden and Michael McGuire
Gainesville, Florida
