Ordered by recording date – Bold indicates leader of date Oct. 1947 - July 1948Oct. 1947 - May 1952July 1948 - Apr. 1952Oct. 1952 - Sept. 1954Nov. 1953 - May 1954Nov. 1953 - Oct. 1954June 1954 - Dec. 1954Aug. 1954 - Oct. 1954Dec. 1954Dec. 1954 - Oct. 1956July 1955Mar. 1956 - Apr. 1956Oct. 1956 - Dec. 1956Apr. 1957June 1957Aug. 1957May 1958Aug. 1958Apr. 1957