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Tappan, C.H., and Waritz, R.S. 1964. Acute inhalation toxicity of Freon-21R (fluorodichloromethane). Report No. 128–64. Newark, Delaware: E.I. du Pont de Nemours and Co., Haskell Laboratory for Toxicology and Industrial Medicine. 2 p. [Unpublished]

Trochimowicz, H.J., Lyon, J.P., Kelly, D.P., and Chiu, T. 1977a. Ninety-day inhalation toxicity studies on two fluorocarbons. Toxicol. Appl. Pharmacol. 41:200, abstr. no. 164.

Trochimowicz, H.J., Moore, B.L., and Chiu, T. 1977b. Subacute inhalation toxicity studies on eight fluorocarbons. Toxicol. Appl. Pharmacol. 41:198–199, abstr. no. 161.

Weigand, W. 1971. [Studies on inhalation toxicity of fluorine derivatives of methane, ethane, and cyclobutane.] Zentralbl. Arbeitsmed. 21:149–156 (in German).

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