HYDE PARK, N. Y., May 31 (U.R) - President Roosevelt today began implementing his proclamation of an unlimited national emergency today by naming Secretary of Interior Harold. L. Ickes virtual dictator of the $10,000,000,000 American oil industry. Designating Ickes as petroleum coordinator for national defense, Mr. Roosevelt ordered him to formulate a program to insure "that the supply of petroleum and its products will be accommodated to the needs of the nation and the national defense program." The move followed Mr. Roosvelt's warnbig in a letter to Speaker Sam Rayborn that oil rationing in the east is a "distinct possilbility"...