00450nam a2200121Ia 4500082002000000100011400020245009700134260004600231300001600277500000500293653000600298700002400304  a518.5bSe471.DC  aSeminar on Data Collection Techniques in the National Sample Survey, C. S. O. & I. S. I., Calcutta, June 1969  aData collection techniques in the national sample survey; proceedingsbcEd. by M. N. Murthy  aNew DelhibDepartment of Statisticsc1970  axiii, 318p.  a  a   aMurthy, M. N. ; ed.