s.n.d.e. pamphlet Detector, Mine ; no. 6A : general description and second to fourth echelon work (draft E.M.E.Rs tels B 362 & B 364) c.a.d. Inventaris van het archief van de commandant der marine te Falmouth, 1940 / H.E.M. Mettes Handbook of the Imperial War Museum : [Lambeth Road, London S.E.I] : 1914 to the present day / With a pref. by Noble Frankland