RT Book, Section SR Electronic(1) A1 United Nations Department of Economic and Social Affairs YR 1957 T1 Deaths T2 United Nations Demographic Yearbook 1956 PB United Nations SN 9789210581851 DO 10.18356/fddcdecf-en-fr UL https://www.un-ilibrary.org/content/books/9789210581851s008-c004