| Type of publication: | Article |
|---|---|
| Notes: | This article is a shortened version of the paper read on May 26, 1961, at the Ninth Conference of Public Health Officers at the Grenzakademie Sankelmark, near Flensburg |
| Source: | ECONIS - Online Catalogue of the ZBW |
Persistent link: https://www.econbiz.de/10002798415