found: Technische Mitteilungen Krupp. Forschungserichte, Feb. 1985:seal on cover t.p. (Krupp) colophon (Fried. Krupp GmbH)
found: New ency. Brit., 15th ed.(Krupp GmbH, in full Fried. Krupp GmbH, limited-liability company created in 1968 when the assets of the Krupp firm were transferred from private family ownership; wholly owned by a foundation called Alfried Krupp von Bohlen und Halbach-Stiftung)
found: Technische Mitteilungen Krupp (Essen, Germany). Tech. Mitt. Krupp, März 1933:cover t.p. (Fried. Krupp Aktiengesellschaft)