Meyer, M. A. d. T. (1951). Some aspects of the hardness of metals.
Lua i Stíl Chicago (17ú heag.)Meyer, Mauritius Arnoldus du Toit. Some Aspects of the Hardness of Metals. 1951.
Lua MLA (8ú heag.)Meyer, Mauritius Arnoldus du Toit. Some Aspects of the Hardness of Metals. 1951.
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