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Émeraudes synthétiques hydrothermales Agee – Hydrothermal-synthetische Smaragde von Agee

Émeraudes synthétiques hydrothermales Agee – Hydrothermal-synthetische Smaragde von Agee. Published in 1994.

Author(s): H.A. Haenni, L. Kiefert, J.-P. Chalain