NTP technical report on the toxicity studies of 3,3',4,4'-tetrachloroazobenzene (CAS no. 14047-09-7), administered by gavage to F344/N rats and B6C3F₁ mice [microform] / Angélique P.J.M. van Birgelen
(Toxicity report series ; no. 65) (NIH publication ; 99-3945)