Uyop Said Uyop bin Said. Megaspores from lower carboniferous strata of Dumfriesshire, Scotland / by Uyop bin Said. - Sheffield : University of Sheffield, 1985. - 201 p. : ill. ; 30 cm. Thesis (Ph. D.) - University of Sheffield, 1985. Subjects--Topical Terms: Paleobotany--Scotland--Carboniferous.