Sumatra 1:50,000.
Great Britain.War Office.General Staff.Geographical Section.
[London] : War Office,
1942.
Marginal diagram showing incidence of grid letters and index to adjoining sheets.
Dutch East Indies, Zone 1 grid overlay.
Copied from Dutch maps dated 1915-1923.
Small block of sheets on Malacca Strait coast, around Medan.
Graphic index in central GSGS file.