Non-compliance of the Government of Portugal with Chap. XI of the Charter of the United Nations and with General Assembly resolution 1542 (XV): report of the Special Committee on Territories under Portuguese Administration (resolution 1699 (XVI) of 19 December 1961) : letter dated 27 November from Miguel Trovoada, Chairman of the Committee for the Liberation fo Sao Thome and Principe (CLSTP), addressed to the Secretary-General