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The copyright below marks my authorship and ensures that no one can sell these materials to others. Making people pay for them would be unethical and violate the terms of this license.

Under the Creative Commons, you get to use, change, copy, distribute, and so on, as long as the materials themselves are free for others and attribution marked.


So far three downloadable documents have a Public Domain marking like this one, indicating Creative Commons Zero, so they can be freely used without attribution and modified/evolved/plagiarized at will.


For all of the site materials this license applies:

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.