[Serial radiography during 1968 and 1969 in the province of North Rhine].
D005860:Germany, West; D006801:Humans; D008400:Mass Chest X-Ray; D011315:Preventive Medicine; D014397:Tuberculosis, Pulmonary / Q000000981:diagnostic imaging / Q000453:epidemiology
Die Röntgenreihenuntersuchungen der Jahre 1968 und 1969 im Landesteil Nordrhein.