File:Popular Science Dec 1918 p68 - History of boat propulsion, Water caterpillar.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:04, 19 February 2009 | 813 × 322 (40 KB) | DMahalko | {{Information |Description={{en|1=The water caterpillar or track drive propulsion for boats predated the use of land based tracked vehicles by about 50 years. }} |Source=Popular Science, Dec 1918, p68, Printed in the United States, Scanned by Google Books |
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