India - petroleum, "An outline of petroleum industry in India and of the broad programmes [sic] and policies pertaining thereto" by S. D. Bhambri, Box: 14, Folder: 54. Charles Heller papers, RH MS 314. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/490245 Accessed May 06, 2024.