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+--- Sujet : [EN] George Hartwig - The Subterranean world (/thread-17545.html)
[EN] George Hartwig - The Subterranean world - ILOVETP - Ven. 29 Mars 2019
George Hartwig, The Subterranean world, 1871. Cavités naturelles et anthropiques. En anglais.
https://drive.google.com/file/d/1FY4mxZTg_y0gb_OHAXJSskZ6KXEVhk5J/view?usp=sharing