Abstracts - Sections 13 to 16, C.13 - Oil and Gas Fields, C.14 - Solid Fuel Mineral Deposits, C.15 - Non-Metallic Mineral Ores, C.16 - Hydrogeology 

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 - 15e Congrès Venise 1931 .
<br/><br/><label>Index Terms--Genre/Form: </label>--Conferences - Meetings