Pg. 96: Water clarity data from Owasco Lake: Virginia Piekarski, Joliet Junior College.

Pg. 234: Water loss data: Eddie Bevilacqua, SUNY College of Environmental Science and Forestry.

Pg. 240: Old Faithful data: Ladonna Hansen, Park Curator, Old Faithful Geyser of California.

Pg. 249: Rawlings, J., S. Pantula, and D. Dickey. 1998. Applied Regression Analysis: A Research Tool. 2nd Ed. Springer.

Other data sets supplied by the author.