Bridget and Raymond Allchin.  The Rise of Civilization in India and Pakistan.  Cambridge: Cambridge University Press, 1982, see especially pp. 347-361 but also passim.

A. L. Basham.  The Wonder That Was India.  New York: The Grove Press, 1959, see especially pp. 10-44.

Jonathan Mark Kenoyer.  Ancient Cities of the Indus Valley Civilization.  Karachi: Oxford University Press, 1998; and the American Institute of Pakistan Studies, see especially pp. 15-31 but also passim.

Gerald J. Larson.  India's Agony Over Religion.  Pp. 54-57.

Stanley Wolpert.  A New History of India.  Pp. 4-5.

World Wide Web: see entries for "Harappa" and "Manas"