%0 Journal Article %A Enrico Arabello %A Maurizio Cornalba %T Footnotes to a Paper of Beniamino Segre. The Number of g1d's on a General d-Gonal Curve, and the Unirationality of the Hurwitz Spaces of 4-Gonal and 5-Gonal Curves. %J Mathematische Annalen %D 1981 %P 341-362 %V 256 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1981__256_163517/ %F MAN_1981__256_163517