Discussing the gaps in '2000 Mules' with Dinesh D'Souza - The Washington Post
Mule (shoe) - Wikipedia
Prada Black Satin Sandals Mules/Slides – The Consignment Bar
Unsung Heroes of World War One: How Horses, Donkeys and Mules Changed the First World War: Austin, Gloria, Foxworthy, Mary Chris: 9781732080515: Amazon.com: Books
What was changed in Dinesh D'Souza's "2,000 Mules" book after it was recalled? : NPR
Of Mules and Mares in a Land of Difference; or, Quadrupeds All?