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A comment on Human-powered cranes and lifting devices (2010). Parent comment
James Burke's Connections traces much of this historry, as does Vaclav Smil's Energy and Civilization.
The Singer ref should reward multiple interests, and can be dipped into at leisure.
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James Burke's Connections traces much of this historry, as does Vaclav Smil's Energy and Civilization.
The Singer ref should reward multiple interests, and can be dipped into at leisure.