1877. Survey of India. Cartographic Details: Scale [1:21,120]. 3 in. = 1 mi." ... latest corrections to 1876." 50 x 35 centimeters Scale [1:21,120]; 3 inch = 1 miles Ames... Surveyor General's Office; Calcutta.
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1877. Geological Survey of India. Cartographic Details: Scale 1:4055040. 1 in. to 64 miles. To accompany: A manual of the geology of India. Pt. 1-2. Calcutta: Geological Survey Offi... Office of Surveyor General of India ; Calcutta.