mule | mammal | Britannica
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Marines' beasts of burden are again leading the pack - Los Angeles Times
Stubbornly Steadfast: Mules Keep the Grand Canyon Moving | The Daily Yonder
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Burden of Mules - Etsy
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The Pros and Cons Of Owning Mules From an Expert
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Army Mules: The Beast of Burden in War - Warfare History Network
Best of the burden: Smokies mules make backcountry operations possible
Burden of Mules - Etsy
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Medieval Bestiary : Beasts : Mule
Beasts of burden: Skittish mules vital to survival of Saguaro National Park
Beasts of Burden — The American Alpine Club
Missouri mules are back, but not as a beast of burden this time | Metro | stltoday.com
Mules rule over horses, donkeys in spatial cognition tests | Tuesday's Horse
Mules were beasts of burden in World War One – Historical articles and illustrationsHistorical articles and illustrations | Look and Learn
Mule - Wikipedia
The Burden of Mules - Wikipedia
We used mules to plow...especially steep mtn slopes...back breaking work! | Mules animal, Horses, Work horses
Mules - Two - Beast of Burden Jigsaw Puzzle by Jan Dappen | Fine Art America
Beasts of burden: Skittish mules vital to survival of Saguaro National Park
Burden of Mules - Etsy
Mule - Wikipedia
:focal(761x449:762x450)/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/77/f5/77f575f5-e468-4a5e-9c0e-748e75bbb00b/gw.jpg "George Washington Saw a Future for America: Mules | History| Smithsonian Magazine")