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Veblen, Thorstein. 1899 (1953). The Theory of the Leisure Class: An Economic Study of Institutions. New York: A Mentor Book.
Parviz Tanavoli. 2005. Heech in a Cage. British Museum.
Veblen, Thorstein. 1899 (1953). The Theory of the Leisure Class: An Economic Study of Institutions. New York: A Mentor Book.