Declassified document MDDC (series). 220 Preparation of polyhaloxylenes 3: Preparation of polychloro-bis; (trichloromethyl) benzenes [with list of literature cited]: by B. T. McBee, H. B. Hass, P. E. Weimer, W. E. Burt, Z. D. Welch, R. M. Robb, F. Speyer.