Energy and Man's Environment. Conservation of energy: Idea and activity guide. Energy and Man's Environment.
Citazione stile Chigago Style (17a edizione)Energy and Man's Environment. Conservation of Energy: Idea and Activity Guide. Portland, OR: Energy and Man's Environment.
Citatione MLA (9a ed.)Energy and Man's Environment. Conservation of Energy: Idea and Activity Guide. Energy and Man's Environment.
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