National Geographic : 1970 Nov
... PAK Calcs4ta. Ar-.y -.* r.S ' C'YLON STATUTEMILES Elevations in feet © N.G.S. Bay of Bengal Little buckle on the Himalayan belt, Sikkim, a protectorate of India, lies on the front line of that country's disputes with China. The roads to Natu and Jelep Passes served as major trade routes into Tibet until Sikkim sealed the border in 1962. INDON ®"