000			00361nam a2200121Ia 4500
082			_bELE
245			_aElementary statistical methods and survey techniques : Sampling and statistical inference _cIndira Gandhi National Open University
260			_aNew Delhi _bI.G.N.O.U _c1991
300			_a55p.
650			_aApplied Sc.
650			_aMathematics
044			_aIndia
999			_c4686 _d4686