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by Siegler, Helmut; Sammet, Marcus
by Muller-Sievers, Helmut; Smith, Chadwick Truscott; Babinski, Paul; et al.
by Tributsch, Helmut; Baumgartner-tributsch, Barbara
by Jensen, Anthony K.; Heit, Helmut
by Schreier, Helmut
by Blanke, Helmut; Jaschke, Hans-Jochen; Manzke, Karl-Hinrich; et al.
by Stampfer, Helmut; Sudtiroler, Burgeninstitut; Sudtiroler, Burgeninstitut
by Aust, Helmut Philipp; Nolte, Georg
by Ziegler, Bodo L.; Combes, Francoise; Dannerbauer, Helmut; et al.
by Stampfer, Helmut; Brandl, Anton; Brandl, Anton J.; et al.