Sheet 75/XXXI-C [Tjilalang] SWPA [First] Edition 1944. Prepared Base Map Plant US Army GHQ SWPA April 1944, from Dutch map Topographic Service Weltevreden 1929. Reproduced BMP US Army GHQ SWPA July 1944. 1000 Meter Modified British Grid System NEI Equatorial Zone. Sheet diagram on reverse.