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Social problems --- Economic sociology --- Relation between energy and economics --- 620.9 --- 502.5 --- 502.5 The nature complex as a whole. Balance. Danger. Damage. Threat of destruction --- The nature complex as a whole. Balance. Danger. Damage. Threat of destruction --- energie --- Energie --- Algemeen.
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Economic history. --- Energy policy --- Power (Mechanics). --- Power resources.
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