Promotion examinations (R.A.F.) "B," "C,"  "E" and "F," held on 26th, 27th, 28th and 29th February, 1928 : report on, with copies of the examination papers and Examiners' remarks thereon /
Great Britain.Air Ministry,issuing body.
Great Britain.His Majesty's Stationery Office.
"22.0041.02.29"