Berichte.

no.1-5 1968; no.6-15 1968-69; no.16-25 1969; no.26-35 1970; no.36-45 1970-71; no.46-55 1971-72; no.56-65 1972; no.66-80 1972-73; no.81-90 1973-74; no.91-100 1974-75; no.101-109 1975-76; no.114-118 1977-78; no.110-113 1977-79; no.124-125 1979; no.119-123 1979-1980; no.130-132 1980; no.126-129 1980-81; no.133-136 1980-82; no.137-140 1982-83; no.145-146 1984; no.141-144 1983-85; no.147 1985; no.148-150 1985; no.151-153 1985; no.154-156 1985; no.157-160 1986; no.161-165 1986; no.166-170 1987; no.171-173 1988; no.174-177 1989; no.178-181 1989; no.182-184 1990; no.185-189 1990-91; no.193-196 1991; no.197-200 1991-92; no.190-192 1992; no.201-203 1992; no.204-206 1992; no.207-210 1993; no.211-213 1993; no.214-216 1993; no.223-225 1993-94; no.217-219 1994; no.220-222 1994; no.226-229 1994; no.230-233 1994; no.234-236 1994; no.237-240 1994; no.241-243 1994; no.244-246 1995