Das Gupta, A. . Principles of Physical Geography / Textual Documents A. Das Gupta & A.N. Kapoor. - 12th ed. / - New Delhi : S. Chand & Company , 1999. - x, 450p. : ill. ; 21cm . Bib. ISBN: 81-219-0258-4 Subjects--Index Terms: Geography-Physiography Physiography Physical geography PG-Geography Dewey Class. No.: 910 / D 26 P