National Academy of Engineering & ebrary, Inc. (1993). Memorial tributes. National Academy of Engineering.
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Dyfyniad Arddull Chicago
National Academy of Engineering and Inc ebrary. Memorial Tributes. Washington, D.C.: National Academy of Engineering, 1993.
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Dyfyniad MLA
National Academy of Engineering and Inc ebrary. Memorial Tributes. National Academy of Engineering, 1993.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.