Experimental medicare claims processing contract field hearing before the Subcommittee on Health of the Committee on Ways and Means, House of Representatives, Ninety-sixth Congress, second session, on performance of Electronic Data Systems Federal Corporation medicare claims processing in Illinois, April 28, 1980, Chicago, IllUnited StatesEnglishBook1980Washington : U.S. G.P.O., 1980.Electronic Data Systems Federal CorporationHospitalization insurance—IllinoisMedicare—IllinoisBook