WATCH ON YEMEN APPROVED BY U.N.; Soviet Stands Aside and Council Votes Sanction Thant Orders Action
UN Security Council, 10-0, with USSR abstaining, approves sending 200-man observer team to Yemen; Amb Fedorenko says USSR abstained because resolution did not set time limit on operation; delegates surprised he did not try to establish principle that all such operations must be approved by Council; Thant sought to avoid showdown with USSR over competence of Assembly to order assessments for such operations; orders van Horn to proceed to Yemen with advance party; Stevenson, in Council debate, argued against time limit