000			00323nam a2200133Ia 4500
008			230917s9999||||xx |||||||||||||| ||und||
040			_e105107 _aMAIN
041			_aEnglish
082			_a519.5 C385E
100			_aCharu
245		0	_aEfficiency of cluster sampling & formation of clusters
300			_a71 p.
942			_cTH
999			_c88545 _d88545