Wasserzieher, Ernst, author
Ferd Dummlers Verlag, 1966
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Wehr, Hans, 1909-1981, author
Otto Harrassowitz, 1959
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Wahrig, Gerhard, author
Bertelsmann Lexikon-Verlag Reinhard Mohn, 1970
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Molema, H.
Diedr. Soltau's Verlag, 18888
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Gayed, Riad, author
Elia's Modern Press, [date of publication not identified]
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