https://www.lrsoc.com/forum/forum_files/ServiceNewsletter53.pdf Service Newsletter No 53 – March 1955
https://www.lrsoc.com/forum/forum_files/ServiceNewsletter43.pdf Service Newsletter No 43 – April 1954
https://www.lrsoc.com/forum/forum_files/ServiceNewsletter41.pdf Service Newsletter No 41 – February 1954
https://www.lrsoc.com/forum/forum_files/ServiceNewsletter40.pdf Service Newsletter No 40 – January 1954
