Nick Beale, Ferdinando D’Amico and Gabriele Valentini,
Air War Italy 1944–45, the Axis Air Forces from the Liberation of Rome to the Surrender (Airlife Publishing Ltd., Shrewsbury, May 1996) ISBN 1 85310 252 0
http://www.ghostbombers.com/night/njg6a.html
http://en.wikipedia.org/wiki/Operati...egranate_(SAS)
P.S. I never found any evidence that elements of NSG 9 were at Perugia in June 1944