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Title: Sulphurous regulus, "Schwefel," Hettstedt [Go to resource]
Description: Sulphurous regulus, "Schwefel," Hettstedt License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1889-164/717 Go to resource More Like this...-
Concentrated copper regulus, "Kupferstein,"…Concentrated copper regulus, "Kupferstein," Hettstedt,…
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