Documents written, directed or translated by this author (4)
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| 1984 Authors: / Hans-Heinrich OTTO , Author / Isidor J. KAMINER / Dierk JUELICH / Ilona KOPANY / Sophinette BECKER / Leonhard HILBERT 
Article : printed text
| Authors: / Sophinette BECKER , Author / U. CLEMENT , Author 
Article : printed text
| Authors: / Hans BECKER , Author / Sophinette BECKER , Author 
Article : printed text
| Authors: / Hans BECKER , Author / Sophinette BECKER , Author
