CREATE TABLE table_1342149_42 (party VARCHAR(255), candidates VARCHAR(255))
How many parties match the canididates listed as howard baker, sr. (r) 68.9% boyd w. cox (d) 31.1%?
    
SQL: SELECT COUNT(party) FROM table_1342149_42 WHERE candidates = "Howard Baker, Sr. (R) 68.9% Boyd W. Cox (D) 31.1%"