Littlejohn, John. "Milk-Aerator." U.S. Patent number 3934842. Washington DC: United States Patent and Trademark Office, 1897.

Littlejohn, John. "Milk-Aerator." U.S. Patent number 3934842. Washington DC: United States Patent and Trademark Office, 1897.

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http://vocab.getty.edu/aat/source/2000075466
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Littlejohn, John. "Milk-Aerator." U.S. Patent number 3934842. Washington DC: United States Patent and Trademark Office, 1897.

Document
http://vocab.getty.edu/aat/source/2000075466
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Littlejohn, John. "Milk-Aerato ...... nt and Trademark Office, 1897.
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Littlejohn, Milk-Aerator (1897)
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