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MLA (8th ed.) Citationservice), SpringerLink (Online. Fräsen [electronic Resource]. Berlin, Heidelberg : Springer Berlin Heidelberg : Imprint: Springer, 1940.
IICA/CATIE Citationservice), S. (. 1940. Fräsen [electronic resource]. Berlin, Heidelberg : Springer Berlin Heidelberg : Imprint: Springer.