Uppdráttur Íslands : 57 Hekla SV.
Geodætisk institut (Denmark)
Landmælingar Íslands.
[Reykjavik] : Landmælingum Íslands,
1979.
At head of title: Geodætisk institut.
"Surveyed by the Danish Generalstaff 1907."
Legend in Icelandic, Danish and English.
Relief shown by contours, spot heights and hachures.