ERVIN UNIT DELAYS HEARINGS ON GIFTS TO NIXON CAMPAIGN
Sen Watergate com postpones indefinitely hearings on contributions to Pres Nixon's re‐election campaign at request of US Atty Paul J Curran, who fears publicity would be prejudicial to upcoming trial of former Nixon Cabinet officers John N Mitchell and Maurice H Stans; trial beings Feb 19, 9 days before com's scheduled expiration, leaving in doubt fate of hearings into contributions by Howard Hughes, and by dairy indus (M)