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*''Historical records of the Survey of India'' (Dehra Dun, 1945-58) by Reginald Henry Phillimore. Comprises 5 volumes. Available on open shelves at British Library shelfmark OIR.354.54. Includes biographical notes of persons involved in the geographical and historical survey of India (the Great Trigonometrical Survey of India) from 1777 to 1843. Also available to read online, refer "Historical books online" below. Volume V, to 1861, may be downloaded as a pdf.