Topographic map 1:50 000 [cartographic material] : [Bhutan].

1st ed. Relief shown by contours and spot heights.; Shows Bhutan only, does not show adjacent areas of India.; Earlier sheets produced by the Survey of Bhutan.; Each sheet includes number and title of region, e.g.,78 M/11, Trashigang/Yangtse.; Each sheet includes a source statement, e.g., "the contours have been copied from 1:50 000 topographic map, sheet no. 78 M/11, published by the Survey of India in 1963".; On some sheets: Revised under Indo-Bhutan Survey Collaboration Project.; Includes administrative index and sheet index