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Revisiting the Middle and Upper Palaeolithic archaeology of Gruta do Caldeirão (Tomar, Portugal)

Fig 18

Entrance trench: Upper Palaeolithic artefacts.

1. Bifacial preform fragment, chert (P21-21, Unit 2). 2. Carinated scraper/core, quartzite (R20-43, Unit 4).

Fig 18

doi: https://doi.org/10.1371/journal.pone.0259089.g018