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Brockhaus-1837: Petitio principii
Brockhaus-1911: Petitio principii
Eisler-1904: Petitio principii
Herder-1854: Petitio principii
Kirchner-Michaelis-1907: petitio principii
Meyers-1905: Petitio principĭi
Pierer-1857: Petitĭo principĭi