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Dyfyniad Arddull ChicagoLyons, Gene Martin. Social Science and the Federal Government. Philadelphia: American Academy of Political and Social Science, 1971.
Dyfyniad MLALyons, Gene Martin. Social Science and the Federal Government. American Academy of Political and Social Science, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.