1. https://collection.maison-dumulon.ca/s/documentation/item/5449: coffre
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2. https://collection.maison-dumulon.ca/s/documentation/item/5430: boussole de poche
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3. https://collection.maison-dumulon.ca/s/documentation/item/4284: boussole
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4. https://collection.maison-dumulon.ca/s/documentation/item/4127: clinomètre
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5. https://collection.maison-dumulon.ca/s/documentation/item/4125: théodolite
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6. https://collection.maison-dumulon.ca/s/documentation/item/4122: boussole
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