Chapter headings and selected papers: Mesosphere-Thermosphere Coupling. Large-Scale Dynamics. Planetary wave dynamics in the mesosphere and lower thermosphere, A. Ebel et al. Tidal coupling between the mesosphere and thermosphere, C. G. Fesen. Dynamics of the mesosphere/lower thermosphere region from radar observations, A. H. Manson. Incoherent scatter observations of tides in the lower thermosphere at high latitudes, P. J. S. Williams & T. S. Vir;i. Gravity Waves, Turbulence, and Localized Observations. Seasonal and latitudinal variations of turbulence in the lower thermosphere, A. D. Danilov et al. Meteoric ions as tracers for gravity waves over the magnetic equator, S. P. Gupta. The Fine Structure Layers in the Atmosphere. Middle Atmosphere - Experiment and Observation. OZAFS space experiment for observing the fine structure of the ozone and aerosol distribution in the atmosphere, G. M. Grechko et al. The distribution and size of laminae of enhanced and depleted ozone in the lower stratosphere, G. Vaughan & S. J. Rei;. Theory. Nonlinear evolution of an unstable stratified shear layer, F. Lott & H. Teitel;aum. On the relationship between the strength of atmospheric radar backscatter and the intensity of atmospheric turbulence, W. K. Hocking. Thermospheric Composition Changes During Magnetic Storms. Composition changes and empirical models, A. E. Hedin. Thermospheric composition and the positive phase of an ionospheric storm, A. D. Danilov & L. D. Bel;k. Recent Advances in Middle Atmosphere Measurements. Incoherent scatter radar observations of the middle atmosphere response to a PCA, C. Hall et al. Transmission of gravity waves and planetary waves in the middle atmosphere based on lidar and rocket measurements, C. R. Philbrick & B. Chen. ;B>Electrical Properties of the Middle Atmosphere. Electrodynamics payloads for small rockets, C. L. Croskey et al. Positive and negative ions of the middle atmosphere, E. Kopp. Author Index.