کتاب های Helmut Ortner
![Functional analytic and complex methods, their interactions, and applications to PDE](http://cdn.ketabkoo.com/covers/0/50388-n.jpg)
Functional analytic and complex methods, their interactions, and applications to PDE
Wolfgang Tutschke, H. Florian, Helmut Florian, N. Ortner, F. J. Schnitzer, W. Tutschke, 2001![The Lone Assassin: The Incredible True Story of the Man Who Tried to Kill Hitler](http://cdn.ketabkoo.com/covers/11/1188329-n.jpg)
The Lone Assassin: The Incredible True Story of the Man Who Tried to Kill Hitler
Helmut Ortner, Ross Benjamin, 2016![O Executor](http://cdn.ketabkoo.com/covers/12/1229647-n.jpg)
O Executor
Helmut Ortner, 2018![Hitler's Henchmen: Nazi Executioners and How They Escaped Justice After WWII](http://cdn.ketabkoo.com/covers/16/1646051-n.jpg)