Creative Commons Attribution-Share Alike 4.0 truetrue English Fuller's calculator in case Wikimedia username: Thincat URL: https://commons.wikimedia...
threshold of originality needed for copyright protection, and is therefore in the public domain. Although it is free of copyright restrictions, this image...
This work is in the public domain because it was published in the United States between 1978 and March 1, 1989 without a copyright notice, and its copyright...
