ebrary, Inc. (1996). Space Studies Board Annual Report 1995. National Academy Press.
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Dyfyniad Arddull Chicago
ebrary, Inc. Space Studies Board Annual Report 1995. Washington, D.C.: National Academy Press, 1996.
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Dyfyniad MLA
ebrary, Inc. Space Studies Board Annual Report 1995. National Academy Press, 1996.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.