Research papers authored by RH Barker consisting of SRDE Reports, IEE publications, R.B Pullen technical report, loose typescript articles and correspondence, SRDE technical memorandum on the stability of pulse monitored servomechanisms and a publication from the Symposium at Military College of Science with a paper by RH Barker. For more detail on these papers see the file level description. There are also some black and white photographs that relate to the GAP Telemetry paper [the paper is a digital copy only]. These files correspond to folder numbers 2,5 and 20 in the original deposit.