https://publications-cnrc.canada.ca/fra/voir/objet/?id=5f4d2b50-d4c4-4014-8e25-2e5ad6d9ed9e
National Research Council of Canada. Division of Building Research, octobre 1966
Water exists in some form beneath almost the entire surface of the earth. Water at the bottom of wells or as it appears in springs is evidence of the existence...
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