Scale 50 Miles to an Inch, 1:3,168,000. Surveyor General of India, 1933. 4th edition 1936, reprinted 1939. Inset continuation of Baluchistan west of Karachi, and of Assam and Burma to Rangoon. Heliozincographed at the Survey of India Offices, Calcutta. Preliminary Edition 1926; 1st Edition ...