@Unpublished{K-theory/0039,
  author = 	 {{Eric M. Friedlander and Barry Mazur}},
  title = 	 {{Correspondence Homomorphisms for Singular Varieties}},
  note = 	 {{Preprint, November 15, 1994, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0039/}}}
}