Negi, Balbir Singh. Geography of resources / by Balbir Singh Negi. - 6th ed / . - Meerut : Kedar Nath Ram Nath , 1997. - xv,729p : ills,tables,maps ; 22cm . NULL ISBN: Rs.140.00 (Pbk) Subjects--Index Terms: GEOGRAPHY Dewey Class. No.: 910 / NEG/G