00371nam a2200121Ia 4500008004100000040001700041082002200058110004100080245004900121260004100170300001200211650002600223190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta311.2bI39N  aIndia. National Sample Survey Office 0aNSS 18th round : February 1963- January 1964  aDelhibManager of Publicationsc1970  ai, 49p.  aSampling (Statistics)