Erdstall (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Erdstall" in Polish language version.

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atlasobscura.com

EricE. Grundhauser EricE., We Still Don't Know Why Medieval Europeans Built Their Mysterious 'Erdstall' Tunnels [online], Atlas Obscura, 1 listopada 2015 [dostęp 2022-10-01] (ang.).

Erdstall – Historisches Lexikon Bayerns [online], www.historisches-lexikon-bayerns.de [dostęp 2022-10-01] .

MatthiasM. Schulz MatthiasM., Hideouts or Sacred Spaces?: Experts Baffled by Mysterious Underground Chambers, „Der Spiegel”, 22 lipca 2011, ISSN 2195-1349 [dostęp 2022-10-01] (ang.).

MatthiasM. Schulz MatthiasM., Hideouts or Sacred Spaces?: Experts Baffled by Mysterious Underground Chambers, „Der Spiegel”, 22 lipca 2011, ISSN 2195-1349 [dostęp 2022-10-01] (ang.).