Digraphe.

no.1-5 Jan.1974-Avril 1975; v.1-4,6 1974-1975; no.6-10 OCT.1975-DEC.1976; v.7-10 1976; no.9-13 (1976-77); v.11-13 1977; no.11-15 Apr 1977-Jun 1978; no.14-17 (1978); v.14-17 1978; no.15-17; no.16-19 Oct 1978-Apr 1979; no.18-21 (1979); v.18-21 1979; no.20-24 Sept.1979-Sept.1980; no.22-25; no.22-24 (1980); v.22-25 1980-1981; no.25 (1981); no.25-28 1981-Sept 1982; v.26 1982; v.27-28 1982; no.26-31 (1982-83); v.29-31 1983; no.29-34 Mar 1983-Sep 1984; v.32-34 1984; no.32-37 (1984-85); v.35-37 1985; no.35-38 Jan 1985-Sep 1986; no.38-42 (1986-87); v.38-42 1986-1987; no.39-42 1987; no.43-46 1988; v.43-46 1988; no.47-50 1989; v.47-50 1989; no.51-54 1990; v.51-54 1990; no.55-58 1991; v.55-58 1991; no.59-62 1992; v.59-62 1992; no.63-66; no.63-66 1993; v.63-66 1993; no.67-70 1994; no.71-72 1994; v.67-69 1994; v.70-72 1994; no.73-74/75 1995; no.73-76 Mars 1995-Juin 1996; v.73-78 1995-1996; no.77-79 Sum. 1996-Wint.1996/9; no.76-79 1996-97; v.79-83 1996-1997; no.86/87 1998; v.84-87 1998; no.88 1998/1999; no.88-90/91 1998/99-1999/2000; v.88-91 1998-2000; no.89 1999/2000; v.92 2000; index no.1/63 1993