Nuclear culture areas - Asoka to Aurangzeb: an attempt to illustrate the relative permanence of boundaries and the persistence of nuclear areas such as Malwa and Gujarat; the evidence permits of rough approximations only (based on standard histories and especially on C.C.Davies, An Historical Atlas of the Indian Peninsula 1949, E.W.Green, An Atlas of the Indian History, 1937 and W.M.Day, "Relative Permanence of Former Boundaries in India". IN: Scottish Geographical Magazine. Vol. XLV, 1949). O.H.K.Spate. India and Pakistan. A General and Regional Geography. London. Methuen & Co. 1960.