[50 years PPmP--what lies ahead?].
von Rad
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D005544:Forecasting; D005858:Germany; D006801:Humans; D010506:Periodicals as Topic / Q000639:trends*; D011570:Psychiatry / Q000639:trends*; D011591:Psychology, Medical / Q000639:trends*; D011611:Psychosomatic Medicine / Q000639:trends*