Citation
To cite the Nonpro Archive article for this content, please use the following format: Ian Stewart, "NSC-151", Nonpro Archive,
. Available online at: https://www.nonproarchive.com/repository-item/1953-05-08/nsc-151. Accessed 06/15/2025. For externally hosted content, you should generally cite the original source of the files rather than its bibliographic record on the Nonpro Archive.