Henriksson, Göran. The Grooves on the Island of Gotland in the Baltic Sea: a Neolithic Lunar Calendar. Paper presented at "Astronomy of Ancient Civilizations", 8th SEAC Conference, Institute of Archaeology, Russian Academy of Sciences. Eds T. Potemkina & V. Obridko. Moscow, 2000.

Henriksson, Göran. The Grooves on the Island of Gotland in the Baltic Sea: a Neolithic Lunar Calendar. Paper presented at "Astronomy of Ancient Civilizations", 8th SEAC Conference, Institute of Archaeology, Russian Academy of Sciences. Eds T. Potemkina & V. Obridko. Moscow, 2000.

Henriksson, Göran. The Grooves on the Island of Gotland in the Baltic Sea: a Neolithic Lunar Calendar. Paper presented at "Astronomy of Ancient Civilizations", 8th SEAC Conference, Institute of Archaeology, Russian Academy of Sciences. Eds T. Potemkina & V. Obridko. Moscow, 2000.

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Henriksson, Göran. The Grooves ...... na & V. Obridko. Moscow, 2000.

Henriksson, The Grooves on the Island of Gotland in the Baltic Sea (2000)

Henriksson, Göran. The Grooves on the Island of Gotland in the Baltic Sea: a Neolithic Lunar Calendar. Paper presented at "Astronomy of Ancient Civilizations", 8th SEAC Conference, Institute of Archaeology, Russian Academy of Sciences. Eds T. Potemkina & V. Obridko. Moscow, 2000.

Henriksson, Göran. The Grooves on the Island of Gotland in the Baltic Sea: a Neolithic Lunar Calendar. Paper presented at "Astronomy of Ancient Civilizations", 8th SEAC Conference, Institute of Archaeology, Russian Academy of Sciences. Eds T. Potemkina & V. Obridko. Moscow, 2000.