Erdkundliches Wissen

no.1-6; no.1-7 1952-1960; no.7; no.8-11 1964-1966; no.12-15 1966; no.16-19 1967-1968; no.20-26 1968-1971; no.23-25; no.26-30 (1970-72); no.27-30 1971-1972; no.31-33 (1972-73); no.31-33 1972-1973; no.34-38 (1973-74); no.34-37 1973-1974; no.38-42 1974-1976; no.48-50 1977-1978; no.43-47 1976-1979; no.51-53; no.54-56 1981-1982; no.57-58 1981-1982; no.59-60 1982; no.65-67 1984; no.68-70 1984; no.80 1986; no.81-83 1986; no.75-77 1985-1987; no.84-85 1986-1987