Cover‐Up Trial Postponed For Three Weeks by Sirica
Judge John J Sirica postpones Watergate cover-up trial until Sept 30 at urging of US Appeals Ct for Washington, DC; delay gives parties some of additional time they have said they need to prepare for trial; it gives Watergate prosecutor Leon Jaworski more time to resolve legal status of former Pres Nixon and it may make it more politically feasible for Pres Ford to take part in resolving Nixon's legal status if he wishes to; background of events leading to ruling; list of participants in Appeals Ct ruling, which was unanimous; Sirica por (M)