1980=[19]79,19; 1981=[19]80,24; 1982=[19]81,30; 1983=[19]82,26; 1984=[19]83,26; 1985=[19]84,25; 1986=[19]85,33; 1987=[19]86,29; 1988=[19]88,1; 1989=[19]88,21; 1990=[19]90,2; 1991=[19]91,1; 1992=[19]91,14; 1993=[19]93,1; 1994=[19]93,16; 1995=[19]95,2; 1996=[19]95,16; 1997=1996,19; 1998=1997,18; 1999=1999,1; 2000=2000,1; 2001=2001,1; 2002=2002,2; 2003=2003,4; 2004=2004,2; 2005=2005,1; 2006=2006,2; 2007=2007,2; 2008=2008,3; 2009=2009,3; 2010=2010,2; 2011=2011,2; 2012=2012,3; 2013=2013,3; 2014=2014,2; 2015=2015,2 von: [Der Betrieb / Beilage] (ISSN: 0171-9181)
