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Der Einfluß von Oxidschichten auf den Reibungs-und Verschleißvorgang bei Gleitreibung: Influence of oxide films on friction and wear during sliding Influence des pellicules d’oxyde sur le frottement et sur l’usure par glissement
Metallographic investigations of ornamental and ceremonial objects from the Royal Tomb of Sipan/Peru. I. Introduction, sample preparation and methods of investigation--studies on copper objects(coffin straps, spacer bars of a beaded pectoral)