ebrary, Inc, & Jarmul, D. (1991). Headline news, science views. National Academy Press.
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Dyfyniad Arddull Chicago
ebrary, Inc, and David Jarmul. Headline News, Science Views. Washington, D.C.: National Academy Press, 1991.
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Dyfyniad MLA
ebrary, Inc, and David Jarmul. Headline News, Science Views. National Academy Press, 1991.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.