EPA's IRIS program : evaluating the science and process behind chemical risk assessment : hearing before the Subcommittee on Investigations and Oversight, Committee on Science, Space, and Technology, House of Representatives, One Hundred Twelfth Congress, first session, Thursday, July 14, 2011.
Imprint
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2011.
