TY - BOOK AU - Chakravarti,Nihar Chandra ED - Indian Statistical Institute (ISI) TI - Instructions to Investigators (and other field workers) T2 - National Sample Survey 1950-51 U1 - 000SC:300(54) PY - 1950/// CY - Calcutta PB - ISI KW - Field works - instructions N1 - Uncorrected Draft Copy ER -