Report on the work of the Directorate of Overseas Surveys in Zanzibar 1977-87 /
Beattie, C. J.
Stephenson, M. K.
Great Britain.Directorate of Overseas Surveys.
Great Britain.Ordnance Survey.
Southampton : Overseas Surveys Directorate,
1989.
At head of title: Ordnance Survey.
Great Britain. Directorate of Overseas Surveys.