|Full Title||Blank, Postcard, "Get your Happiness out of your Work or you will never know what real Happiness is," [n.d.].|
|Publisher||East Aurora, NY : Roycroft Shops.|
|Source||Hubbard Papers and Photographs|
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OH 1/14/13 1p. Hubbard's motto can be found in: "The motto book; being a catalogue of epigrams. East Aurora, N.Y., The Roycrofters, 1914, p. 25."