Model 10 Exerciser [Model 09810-90021], the HP 9810/20 magnetic card. Arcade-History/Gaming/History the website. June 13, 2024. Available at https://www.arcade-history.com/?page=detail&id=273792. Accessed June 13, 2024.
BibTeX entry
@misc{gh:273792, author = {Arcade-History/Gaming-history}, title = {Model 10 Exerciser [Model 09810-90021], the HP 9810/20 magnetic card}, year = {2024}, url = {"https://www.arcade-history.com/?page=detail\&id=273792"}, note = {[Online; accessed June 13, 2024]} }