00462nam a2200133Ia 4500008004100000040001700041082002200058110004200080245007600122260003200198300000800230500006400238650002600302190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta311.2bI39N  aIndian. National Sample Survey Office 0aNSS 24th round : September 1969-June 1970 ; instructions to field staff  aCalcuttabThe Authorsc1969  aVp.  aContents: v.1. Design, concepts, definitions and procedures  aSampling (Statistics)