<div>Composition of Group 3d obsidian from the Middle East, analysed by pXRF (one by PIXE).</div><div><br></div><div>Campbell, S., Healey, E., & Maeda, O. (2020). Profiling an unlocated
source: Group 3d obsidian in prehistoric and early historic near East. <i>Journal of Archaeological Science: Reports</i>, <i>33</i>, 102533.</div>