ebrary, Inc. (1993). National issues in science and technology, 1993. National Academy Press.
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Dyfyniad Arddull Chicago
ebrary, Inc. National Issues in Science and Technology, 1993. Washington, DC: National Academy Press, 1993.
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Dyfyniad MLA
ebrary, Inc. National Issues in Science and Technology, 1993. National Academy Press, 1993.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.