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Wikidata

https://www.wikidata.org/wiki/Q828361

Cleanliness is the minimal requirement for a modern enterprise to function properly

Cleanliness is the minimal requirement for a modern enterprise to function properly (ca. 1953)

Never stop

Never stop (1976, October)

Ordinary worker

Ordinary worker (ca. 1977)

Pay attention to sanitation and hygiene, beautify the environment of schoolyards

Pay attention to sanitation and hygiene, beautify the environment of schoolyards (1987, June)

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