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040 _aBD-DhUL
_cBD-DhUL
082 _a553.622
_bSAU
100 _4Sarker, Supria.
245 _aUnderground sand extraction in Bogra : a case study of land degradation /
_h[MS Thesis]
260 _aDhaka :
_bUniversity of Dhaka,
_c2007.
300 _avi, 76 p. :
_bill. : maps ;
_c30 cm
500 _aThesis (M. S) -- Dept. of Geography and Environment, University of Dhaka, 2002-2003
650 _2Sand
650 _2Environment
942 _2ddc
_cREF
999 _c42888
_d42888