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pro vyhledávání: '"Jochen Duckeck"'
Publikováno v:
Geoheritage. 14
Caves are among the most visited geological features in the world, attracting over 70 million people every year in more than 1,200 caves worldwide, and amounting up to 800 million Euros in entrance fees alone. The global business of show caves employ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::896310931f1dd169d4080d52e539f408
https://doi.org/10.1007/s12371-022-00717-5
https://doi.org/10.1007/s12371-022-00717-5
