55Rxx Fiber spaces and bundles

55R05  Fiber spaces
55R10  Fiber bundles
55R12  Transfer
55R15  Classification
55R20  Spectral sequences and homology of fiber spaces, See Also {
               55Txx}
55R25  Sphere bundles and vector space bundles
55R35  Classifying spaces of groups and ${H}$-spaces
55R40  Homology of classifying spaces, characteristic classes, See
               also {57Txx, 57R20}
55R45  Homology and homotopy of $BO$ and $BU$; Bott
               periodicity
55R50  Stable classes of vector space bundles, $K$-theory, See
               also {19Lxx}, {For algebraic $K$-theory, See 18F25,
               19-XX}
55R55  Fiberings with singularities
55R60  Microbundles and block bundles, See also {57N55, 57Q50}
55R65  Generalizations of fiber spaces and bundles
55R91  Equivariant fiber spaces and bundles, See also {19L47}
55R99  None of the above but in this section