1. DailyScene.com (2011). NJ town puzzles over mystery hole in ground.
2. Monika Kumlehn de Mamani & Ingrid Grambow (2015). IMPAKTNAMEN: Namen der [Meteorite; Impakte/Krater; Boliden/Fireballs; Tektite] im Sonnensystem.

(DailyScene.com, 2011).

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