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cover image of Antifragil durch jede Krise

Antifragil durch jede Krise

Heinz Peter Wallner Author
Dodo Kresse Author
(2020)

cover image of LEADERBUCH Nr. 1

LEADERBUCH Nr. 1

Heinz Peter Wallner Author
Dodo Kresse Author
(2021)

cover image of train the eight Leadership

train the eight Leadership

Heinz Peter Wallner Author
Kurt Völkl Author
(2022)