00633nam a22001937a 4500 BD-DhUL 20151109095620.0 151109s200707 bg a|||| m||| 00| 0|eng d BD-DhUL BD-DhUL 553.622 SAU Sarker, Supria. Underground sand extraction in Bogra : a case study of land degradation / [MS Thesis] Dhaka : University of Dhaka, 2007. vi, 76 p. : ill. : maps ; 30 cm Thesis (M. S) -- Dept. of Geography and Environment, University of Dhaka, 2002-2003 Sand Environment ddc REF 42888 42888 0 0 ddc 0 553_622000000000000_SAU 1 REF 69433 DUSL DUSL REF 2015-11-09 Gift 553.622 SAU 429386 2015-11-09 2015-11-09 REF