The Polar Cusp

Physical Signatures of Magnetospheric Boundary Layer Processes

Dynamical and Chemical Coupling Between the Neutral and Ionized Atmosphere: Proceedings of the NATO Advanced Study Institute held at Spåtind, Norway, April 12–22,1977

Exploration of the Polar Upper Atmosphere: Proceedings of the NATO Advanced Study Institute held at Lillehammer, Norway, May 5–16, 1980