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1Bằng Oldenberg, Karl### CRL customization ### ?> ### Add publisher and desc details ### ?>
Được phát hành 1902Jena : Fischer, 1902.74 p.“...International Association for Labor Legislation. German Section...”
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2Bằng Israel, Gertrud### CRL customization ### ?> ### Add publisher and desc details ### ?>
Được phát hành 1929Berlin : Büro für Sozialpolitik, 1929.46 p.“...International Association for Labor Legislation. German section...”