Bavadam, Lyla. "Questionable claims: Archaeologists debunk the claim that underwater structures in the Gulf of Khambhat point to the existence of a pre-Harappan civilisation." Frontline 2–15 March 2002. [1].
Page 18 - A description of the coasts of East Africa and Malabar in the beginning of the sixteenth century,by Duarte Barbosa, a Portuguese. Tr. from an early Spanish manuscript in the Barcelona library; with notes and a preface, by the Hon. Henry E.J.Stanley" : PDF