書誌注記"This bibliography ... consolidates into one publication all reports previously listed in the original bibliography (EPA-LIB-73-01; PB-223 693) dated July 1973, the first supplement (EPA-LIB-74-03; PB-234 215) dated August 1974, the second supplement (PB-238 800) dated December 1974, and issues of the EPA reports bibliography quarterly published during 1975 and 1976."