https://www.lrsoc.com/forum/forum_files/ServiceNewsletter59.pdf Service Newsletter No 59 – September 1955
https://www.lrsoc.com/forum/forum_files/ServiceNewsletter53.pdf Service Newsletter No 53 – March 1955
https://www.lrsoc.com/forum/forum_files/ServiceNewsletter50.pdf Service Newsletter No 50 – November 1954
https://www.lrsoc.com/forum/forum_files/ServiceNewsletter48.pdf Service Newsletter No 48 – September 1954
