Advert for the Golden Square Dojo in the Boys Own Paper of December 1922.
Unknown author<span style="display: none;">Unknown author</span>
scan from <a rel="nofollow" class="external text" href="https://orca.cardiff.ac.uk/136518/">The Golden Square Dojo and its place in British Jujutsu history</a> <a href="https://en.wikipedia.org/wiki/International_Standard_Serial_Number" class="extiw" title="en:International Standard Serial Number">ISSN</a> <a rel="nofollow" class="external text" href="https://www.worldcat.org/issn/2057-5696">2057-5696</a>