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Chemistry laboratory at the Eidgenössische Technische Hochschule (ETH), Zürich. Photograph, ca. 1930.

Moko/La Rosa Negra, ethnobotany of the Popoluca Veracruz, Mexico / presented by Marco Leonti.

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Moko/La Rosa Negra, ethnobotany of the Popoluca Veracruz, Mexico / presented by Marco Leonti.