00430nam a2200121Ia 4500008004100000040001700041082002300058110007000081245006900151260003700220300000900257650004200266190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta354.54bI39A  aIndia. Cabinet Secretariat. Directorate of National Sample Survey 0aAnnual report of the national sample survey for the year 1956-57  aDelhibCabinet Secretariatc1957  a29p.  aSampling (Statistics); Sampling-India