Thompson, Bucy, and Mountcastle on partial derivatives in thermo

J.R. Thompson, B.R. Bucy, D.B. Mountcastle
Assessing Student Understanding of Partial Derivatives in Thermodynamics
2005 Physics Education Research Conference Proceedings, edited by P. Heron, L. McCullough, and J. Marx, AIP Conference Proceedings 818, 77-80 (2006)