by Robert S. Desanto | .
by Leith, Helmut | Whittaker, Robert H.
by R. Rieger | .
by Leonid I. Korochkin | .
by S.Shaltiel | .
by K.H. Chadwick | H.P Leenhouts.
by A. Fiechter | .
by Walter Hoppe | .
by E.K.F. Bautz | P. Karlson H. Kersten.
by Jiirgen Kiefer | .
by Wolfgang Weiser | .
by P.H. Connett | .
by Werner Kunz | .
by Franz Christian Czygan | .
by Urs Brodbeck | .
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