Talking Machine World, November 15, 1917, p. 39: "The Ricardo Gramophone Co., Montreal, has been incorporated to manufacture and deal in phonographs. Capital, $20,000. The incorporators are: Ricardo Lefebvre, manufacturer; Gustave Durand. advocate; Amanda Clermont, clerk; J -Emanuel Gagne, physician, and Orphyre Lefebvre, painter, of Montreal."

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Montreal Star, November 7, 1919, p. 20.