Wikipedia (en) über den Ort Montmorillon: "The widely popular Coopération pédagogique range of educational posters were produced in Montmorillon, in the 1950s by Éditions Rossignol." - Wikipedia (en), 04.01.2021.
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Wikipedia (en) über den Ort Montmorillon: "The widely popular Coopération pédagogique range of educational posters were produced in Montmorillon, in the 1950s by Éditions Rossignol." - Wikipedia (en), 04.01.2021.
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