RO16 Win G Winchell,Contance Mabel,1896-Guide to reference books.1951. (Ficha2) ----Second supplement, 1953-1955,by Constance M Winchel . Chicago,1956. ----Second informal supplement ,1938-1940,by Constance M. Winchel. Chicago, 1941.----- Third informal suplement ,1941-1943. by Constance M. Winchell. Chicago,1944.