RUSSIANS STEP UP FLOW OF ARMS AID TO CASTRO REGIME; More Technical Personnel Sent In--U.S. Aides Doubt Rise in Offensive Power SOVIET INCREASES AID FLOW TO CUBA
US repts USSR has stepped up shipments of mil equipment and tech personnel; cites arrival of more than 20 ships since late July; estimates tech personnel at 3,000-5,000; doubts arms are sufficient for offensive power