character: Michael Brown
topic: Innovations in Bridge Design
grade: 12
subject: Geography
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character: John A. Roebling
topic: Suspension Bridge Engineering
grade: 12
subject: Geography
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character: Eiffel Tower Engineers
topic: Metal Structures and Bridge Design
grade: 12
subject: Geography
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character: Robert Maillart
topic: Reinforced Concrete Bridges
grade: 12
subject: Geography
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