Section headings and selected papers: Scientific Coordination of Solar Physics Missions in the 1990s. Foreword. Fundamental Problems in Solar Physics Requesting Coordinated Programs during Maximum of Activity. The energy budget in active regions and flares, J C Henoux. New perspectives in flare models and theories, T Sakurai. Cooperative Projects Related to Solar Activity. International cooperative programs in solar physics and solar-terrestrial research, M E Machado. The US Max '91 program of flare research, A Kiplinger & B R Denni;. Contributed Papers. Plasma diagnostic capabilities of the soft X-ray telescope on solar-A, K T Strong et al . The SOLAR-A hard X-ray telescope (HXT), T Kosugi et al . Flares and filament formation due to the interaction between two active regions, B Schmieder et al . Conclusions. Needs and constraints for ground-based cooperative programs on solar flares, V Gaizauskas. Needs and constraints for solar flares space-borne cooperative programs, Z Svestka. High-Resolution Solar Physics from Space and the Ground. High resolution telescopes at the National Solar Observatory, R B Dunn & R N Smart;. The orbiting solar laboratory, B W Lites. High resolution solar physics from rockets, K P Dere. An investigation of the height distribution of the gas flow velocity in the solar granulation, V S Markov. High resolution observations of active phenomena obtained at Hida Observatory, H Kurokawa et al . Solar physics at ultrahigh resolution from the space station with the solar ultraviolet network (SUN), L Dame et al . Some developments in the theory of magnetic flux concentrations in the solar atmosphere, M Knolker et al . Author Index.
