Survey of India. "Refer to this map as: "1:20,000 Allahabad guide map, second edn., India." Relief shown by 5 meter contour intervals. Insets: "See Allahabad" (1:60,000); "Inset for Phaphamau" (1:20,000); "Bus routes" (1:60,000); "Allahabad neighbourhood" (1:2,500,000.) Map is a photocopy made at the Library of the Congress.