%0 Journal Article %A Robert W. Switzer %T Postnikov Towers Associated with Complex 2-Plane and Symplectic Line Bundles. %J Mathematische Zeitschrift %D 1979 %P 87-104 %V 168 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1979__168_172863/ %F MZ_1979__168_172863