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PAN-00080268 - military button, Dutch 19th-20th century: Engineers (helmet on dotted background)
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PAN-00082298 - military button, Dutch 19th-20th century: Engineers (helmet on dotted background)
Cost-effectiveness of mandatory bicycle helmet use to prevent traumatic brain injuries and death
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Bicycle Helmets and Bicycle-Related Traumatic Brain Injury in the Netherlands
PAN-00110401 - military button, Dutch post-Napoleonic: Engineers (helmet on dotted background)
PAN-00110402 - military button, Dutch post-Napoleonic: Engineers (helmet on dotted background)
PAN-00108892 - military button, Dutch post-Napoleonic: Engineers (helmet on dotted background)
PAN-00112725 - military button, Dutch post-Napoleonic: Engineers (helmet on dotted background)
PAN-00112539 - military button, Dutch post-Napoleonic: Engineers (helmet on dotted background)
PAN-00117868 - military button, Dutch post-Napoleonic: Engineers (helmet on dotted background)