Assam, Bhutan & Tibet, No 78M. Towang

1920

Survey of India

253k/250k Maps of South Asia

1921

Brown, John

Bhutan, No 78 I, Tongsa

1935

Survey of India

253k/250k Maps of South Asia

1935

Brown, John

India and adjacent countries

1931

Survey of India offices

1:1m

World Aeronautical Chart. Brahmaputra River (554).

1954

Aeronautical Chart Service, U.S. Army Air Forces

1:1m

253k/250k Maps of South Asia

1913

Brown, John

(Bengal, Bahar &c north)

1794

Robert Laurie & James Whittle

1:750k

Pundit Maps

1915

John Brown

India 8.

1883

Letts, Son & Co.

1:2m