Eupen, Grenz-Echo-Verlag 1982 xii + 525pp., 22cm., in the series "Ostbelgische Studien" volume I, publisher's hardcover in green cloth with gilt lettering, good condition, B121571
Eupen, Grenz-Echo-Verlag 1986 xv + 383pp., with few ills., 22cm., in the series "Ostbelgische Studien" volume II, publisher's hardcover in green cloth with gilt lettering, illustrated dustwrapper, good condition, B121572
Eupen, Grenz-Echo-Verlag 1988 xxxii + 449pp., with some ills., 22cm., in the series "Ostbelgische Studien" volume III, publisher's hardcover in green cloth with gilt lettering, illustrated dustwrapper, good condition, B121573