%0 Journal Article %A Joe Harris %A Phillip Griffiths %T On the Noether-Lefschetz Theorem and Some Remarks on Codimension-two Cycles. %J Mathematische Annalen %D 1985 %P 31-52 %V 271 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1985__271_163951/ %F MAN_1985__271_163951