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Dyfyniad Arddull ChicagoGudbjörnsson, Björn. Clinical and Experimental Studies in Primary Sjögren's Syndrome. Uppsala: Uppsala University, 1994.
Dyfyniad MLAGudbjörnsson, Björn. Clinical and Experimental Studies in Primary Sjögren's Syndrome. Uppsala University, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.