TY - BOOK ED - India. National Sample Survey Organization TI - Instructions to field workers: National Sample Survey: 1960 - 61 U1 - 000SC:300(54) PY - 1960/// CY - Calcutta PB - Indian Statistical Institute KW - Fields works - instructions : Fields works - schedules N1 - V1. Design, concepts, definitions and procedures - v2. Schedules of Enquiry ER -