Pollard Memorial Library (Lowell)
Ballista + Design and construction
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http://bibfra.me/vocab/lite/Concept
Label
Ballista + Design and construction
Name
Ballista + Design and construction
Focus
Ballista + Design and construction
Sub focus
Ballista
Design and construction
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The art of the catapult, build Greek ballistae, Roman onagers, English trebuchets, and more ancient artillery, William Gurstelle
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Focus
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Ballista + Design and construction
Sub focus
2
Ballista
Design and construction
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