Strahler , Alan. Physical geography : science and systems of the human environment /Alan Strahler , Arthur Strahler. - 2nd ed. - New Delhi : John Wiley. ,2002. - 749p.+1Cd. ;23cm. ISBN: 9788126511921 ₹ Subjects--Topical Terms: Physical Geography. Dewey Class. No.: 910.02 / S82P