This debate between James P. Miller (1915-1978) and G. K. Wallace (1903-1988) was held in Tampa, FL  from August 16-20, 1965. 
The Proposition: “Such an arrangement and cooperation effort on the part of churches of Christ for the preaching of the Gospel, as the Herald of Truth, is without Scriptural authority.”
Affirm: James P. Miller, Deny: G. K. Wallace
This debate was transferred from the original reel-to-reel tapes provided by Ben Vick, Jr., minister of the Shelbyville Road Church of Christ in Indianapolis, IN.