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Observations on variations in electrical conductivity of pure demineralized water: modification (” activation”) of conductivity by low-frequency, low-level alternativing electric fields
Field-analysis of condensing gas and oil-fired heating installations in the refurbishment area (FAGO); Feldanalyse von kondensierenden Gas-und Oelfeuerungsanlagen im Sanierungsbereich (FAGO)
The Scottish Staple in the Netherlands.(An account of the trade relations between Scotland and the Low Countries from 1292 till 1676, with a calendar of illustrative documents.)