There is a paper written by R.T. Seeley in the Proceedings of Symposia Pure Mathematics that I've seen cited by several papers I've been reading, but I can't find it anywhere. The citation given is R. SEELEY, Complex Powers of an Elliptic Operator, “Singular Integrals (Proc. Symp. Pure Math., Chicago, 1966),” 288-307, Amer. Math. Sot., Providence, R. I., 1967. If anyone at all could help me find it I would greatly appreciate it.