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Sandra A. Brycea1c1, James M. Omernika2 and David P. Larsena2
a1 Dynamac Corporation, Corvallis, Oregon
a2 U.S. Environmental Protection Agency, Corvallis, Oregon
(Received February 19 1999)
(Revised May 28 1999)
(Accepted June 11 1999)
c1 Dynamac Corporation, U.S. EPA National Health and Environmental Effects Research Laboratory, Western Ecology Division, 200 SW 35th St., Corvallis, OR 97333; (fax) 541-754-4338; (e-mail) firstname.lastname@example.org