1. H. O. publications. 84. Oct. 7, 1950 supplement to Hydrographic Office publication 84, sailing directions for west coasts of Mexico and Central America, corrections and additions from date of publication (Dec. 1, 1937) to Oct. 7, 1950 (including N. M. 40/50). Bookmark Corporate/Agency Authors: Hydrographic Office (Navy) and Defense Dept. Publisher: Hydrographic Office (Navy) Date: 1950 SuDoc number: N 8:84/937-14