EPA reports bibliography, supplement 2 : a listing of EPA reports entered into the National Technical Information Service in 1974 / Library Systems Branch ... [et al.].
EPA reports bibliography, supplement 2 : a listing of EPA reports entered into the National Technical Information Service in 1974 / Library Systems Branch ... [et al.].
"This bibliography supplements the original one (EPA-LIB-73-01 ; PB-223 693) dated July 1973 and the first supplement (EPA-LIB-74-03 ; PB-234 215) dated August 1974"--P. [i].