The author Dan Koehl intended not to use any copyrighted material for the publication or, if not possible, to indicate copyright of the respective object.
The copyright for any material created by the author Dan Koehl is reserved Copyrighted but you can use what's here as long as you credit me Any duplication or use of objects such as images, diagrams, sounds or texts in other electronic or printed publications is not permitted without the authors agreement.
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