Request for the inclusion of an additional item in the agenda of the 16th regular session: item proposed by Argentina, Brazil, Bolivia, Chile, Colombia, Costa Rica, Cuba, El Salvador, Ecuador, Guatemala, Haiti, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Uruguay and Venezuela. Enlargement of the Advisory Committee on Administrative and Budgetary Questions, Letter dated 10 Oct 1961 from the Permanent Representative of Costa Rica to the UN addressed to the President of the General Assembly