Orbis.

v.1 no.2-4 1957/1958; v.10 no.3-4 1966/1967; v.11 1967/1968; v.12 no.1-2 1968; v.12 no.3-4 1968/1969; v.13 no.1-2 1969; v.13 no.3-4 1969/1970; v.15 no.1-2 1971; v.15 no.3-4 1971/1972; v.16 no.1-2 1972; v.16 no.3-4 1972/1973; v.17 no.1-2 1973; v.17 no.3-4 1973/1974; v.18 no.1-2 1974; v.18 no.3-4 1974/1975; v.19 no.3-4 1975/1976; v.20 no.1-2 1976; v.20 no.3-4 1976/1977; v.24 1980/1981; v.25 no.1-2 1981; v.25 no.3-4 1981/1982; v.26 no.1-2 1982; v.26 no.3-4 1982/1983; v.27 no.1-2 1983; v.27 no.3-4 1983/1984; v.28 no.1-2 1984; v.28 no.3-4 1984/1985; v.29 no.1-2 1985; v.29 no.3-4 1985/1986; v.30; v.31 (spring/fall 1987); v.31 no.1-3 1987; v.32 (1988); v.34; v.35 (1991); v.36:2 (spring 1992); v.36:3 (summer 1992); v.36:4 (fall 1992); v.37:1-2 (winter-spring 1993); v.37:3-4 (summer-fall 1993); v.38 (1994); v.39 (1995); v.40:1-2 (winter-spring 1996); v.40:3-4 (summer-fall 1996); v.48 no.1 2004