[Comparative study on certain social medical conditions in large cities, small cities and rural sections].
D001699:Biometry; D002947:Cities; D006801:Humans; D012423:Rural Health / Q000706:statistics & numerical data*; D012424:Rural Population; D012924:Social Conditions; D012936:Social Medicine / Q000706:statistics & numerical data*
RURAL HEALTH/statistics; SOCIAL MEDICINE/statistics