SOURCES OF POLYCHLORINATED NAPHTHALENES IN URBAN AIR AND OCCURRENCE IN THE ARCTIC ENVIRONMENT Publication Attachment: 02-401.pdf Authors: Helm, Paul A., Bidleman, Terry F., Jantunen, Liisa M.M., Stern, Gary A., Koczanski, Krystyna, Li, Henrik, Fellin, Phil, Ridal, Jeff Year: 2002