Hvistendahl, H. S. (1964). Engineering units and physical quantities. Macmillan.
Lua i Stíl Chicago (17ú heag.)Hvistendahl, H. S. Engineering Units and Physical Quantities. London: Macmillan, 1964.
Lua MLA (9ú heag.)Hvistendahl, H. S. Engineering Units and Physical Quantities. Macmillan, 1964.
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