1970: v. 6 (1-3) 1971: v. 7 (1-3) 1972-1973: v. 8-9 1974: v. 10 (1-2) 1975: v. 11 (1-3) 1976-1982: v. 12-18 1983: v. 19 (2-4) 1984-1987: v. 20-23 1988: v. 24 (1) 1990: v. 26 1991: v. 27 (1-2) 1996: v. 32 1997: v. 33 1998: v. 34 1999: v. 35 2000 : v. 36 (1) 2001: v. 37 (1-4) 2003: v. 39 (1-4) 2004: v. 40 (1-4) 2005: v. 41 (1-4) 2006: v. 42 (1-4) 2007: v. 43 (2) 2008: v. 44 (2) 2010: v. 46 (1-4) 2011: v. 47 (1, 3, 4) 2012: v. 48 (1, 4) 2013: v. 49 (3, 4) 2014: v. 50 (6) 2015: v. 51 (1, 3-5) 2016: v. 52 (1, 2) Faltantes: 1970 : v. 6, no. 4 ; 1971 : v. 7, no. 4 ; 1974 : v. 10, nos. 3, 4 ; 1975 : v. 11, no. 4 ; 1988 : v. 24, no. 4 ; 1991 : v. 27, nos. 3, 4 ; 1992-1995. ; 5