Gerald R. Lucas:Copyrights

Unless otherwise stated, all contents are published under the Creative Commons license "Attribution-NonCommercial-ShareAlike 4.0 International" (CC BY-NC-SA 4.0). Exceptions of this rule are clearly indicated by a footer below the respective page as done. Images may have their own licenses, accessible by clicking on the image, and they are not automatically subject to the license of the page in which they are embedded.