Report on the accident to Boeing Vertol 234 LR, G-BWFC 2.5 miles east of Sumburgh, Shetland Isles on 6 November 1986 : including the review before P.G.B. McNeill and P. Hancock and K.V. Kellaway /
Great Britain.Air Accidents Investigation Branch.
McNeill, Peter G. B.
Hancock, P.
Kellaway, K. V.
London : HMSO,
1989.
Aircraft accidents.