00364nam a2200109Ia 4500082001700000100008300017245007000100260003000170300001000200490003900210500000500249  a312bUn58.PR  aUnited Nations. Statistical Office. Economic & Social Affairs, Department of-.  aPrinciples and recommendations for the 1970 population censusesb  aNew YorkbThe Auth.c1977  a163p.  aStatistical papers series M, no.44  a