Foreword.P.T.Landsberg 3
Intr？duction.J.Hertz 3
Disorder and Localizations 4
Nonlinear conductance in the mesoscopic regime.D.E.Khmel'nitskii and A.I.Larkin 4
Magnetic properties of doped semiconductors.R.N.Bh 7
New light on the scattering mechanisms in Si inversion layers by weak localization experiments.P.E.Lindelof，J.Norregaard and J.Hanberg 17
Metal-non metal transition in the double-donors Si：P，As and Si：P，Sb：A simple approach.A.Ferreira da Silva 27
Remarks on localization in semimagnetic semiconductors.T.Dietl，L.Swierkowski，J.Jaroszynski，M.Sawicki and T.Wojtowicz 29
Burstein-Moss effect in Hg 1-xCd x Te.J.Chu，D.Qian and D.Tang 37
Quantum Hall Effect 42
Density of states of two-dimensional electron systems at high magnetic fields.J.P.Eisenstein 42
Theory of the fractional quantum hall effect.I.Z.Kostadinov 49
Spin-reversed quasiparticles in the fractional quantum Hall effect-finite system calculations.T.Chakraborty and P.Pietilainen 58
Fluctuation，Noise and Chaos 62
Non-equilibrium noise in localised systems.J.B.Pendry 62
Chaotic dynamics in Ge photoconductors.R.M.Westervelt，S.W.Teitsworth and E.G.Gwinn 65
Chaotic dynamics in a simple model of extrinsic photoconductors.S.W.Teitsworth，B.A.Lynn and R.M.Westervelt 71
New bifurcation routes to chaos of a driven current filament in semiconductors simulated by numerical computation.K.Aoki，N.Mugibayashi and K.Yamamoto 76
Quantum oscillations in ultrasmall normal loops and tunnel junctions.M.Buttiker 82
Exact treatment of a nonlinear driven oscillator.E.J.Ding 89
Conductance oscillations in electroformed semicontinuous Au-AI tunnel junctions.M.S.Raven 93
Abstracts 99
Weak localization in thin films.G.Bergmann 99
Conduction in small localized 2D systems.A.B.Fowler 99
The fractional quantum hall effect：phonons，rotons and fractionally charged vortices S.M.Girvin 100
Quantum interference phenomena in conduction through submicron systems.Y.Imry 100
A simple model for the origin of chaos in semiconductors.P.T.Landsberg，E.Scholl and P.Shukla 101
Magnetic tuning of the metal-insulator transition for uncompensated arsenic-doped silicon.W.N.Shafarman，T.G.Castner，J.S.Brooks，K.P.Martin and M.J.Naughton 101
Measurements of universal conductance fluctuations.W.J.Skocpol 102
Unive？？？？？？？nductance fluctuations，magnetofingerprints，and the Aharonov-Bohm effect in metals.A.D.Stone 102