Treaties and other international acts series. * Paper, $10.00 a yr. (approximately 150 issues), $3.50 additional for foreign mailing; single copies vary in price. A-3648. Mutual defense assistance, agreement between United States and Norway amending Annex C of agreement of Jan. 27, 1950, as amended, effected by exchange of notes dated Oslo Nov. 15 and 23, 1955; [entered into force Nov. 23, 1955].