International enforcement workshop : proceedings : May 8-10, 1990, Utrecht, The Netherlands
[s.n.], [1992]
"This is a reprint of the Proceedings of Volume I and II of the International Enforcement Workshop ... this reprint from the originals both volumes have been bound under a single cover. the Organizing Committee, 14 January 1992"
"Organized by United States Environmental Protection Agency, Netherlands Ministry of Housing, Physical Planning and Environment" -- v. 1, T.p. verso.