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National Science Foundation / National Science Board - Washington, DC : US Gov.Print.Off. - 8.1987 -

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USA / National Aeronautics and Space Administration / …; … - Washington, DC : US Gov. Print. Off. - Nachgewiesen 1976 -

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Massachusetts Institute of Technology - Cambridge, Mass. : [Verlag nicht ermittelbar] - 100.1997,2 - 101.1998,2

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USA / National Aeronautics and Space Administration - Washington, DC : [Verlag nicht ermittelbar] - Nachgewiesen 1996 -

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Lewisburg, Pa. - 7.1993 - 9.1995

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USA / Bureau of the Census - Washington, DC : US Gov. Print. Off. - Nachgewiesen 1972(1975) -

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USA / Bureau of Labor Statistics - Washington, DC : US Gov. Print. Off. - 1988 -

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Detroit, Mich. [u.a.] : Gale Research Inc. - Nachgewiesen 2.1992 -

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Washington, DC : US. Gov.Print.Off. - 1980 - 1982

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New Providence, NJ : Marquis; anfangs: Chicago, Ill. : … - 17.1972/73(1971) - 33.2002/03(2002)

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