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
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 .
--Conferences - Meetings
--Conferences - Meetings