Theory of the Motion of an Artificial Satellite.- Advances in Rapid Orbit Prediction and Applications to Satellite Visibility Studies.- Determination of the most Probable Elements of a Satellite Orbit from Incomplete Systems of Elements.- On the Influence of Distribution of Observations on Accuracy of Orbital Elements of the Earth's Artificial Satellites.- The Use of Ellipsoidal Harmonics for the Representation of the Geopotential.- Computer Derivation of Short-Period Lunar Perturbations.- Perturbations du Second Ordre d'un Satellite Artificiel de la Terre.- A Short Study on the Motion of Artificial Satellites of Mercury and Venus.- Results on the Mass and the Gravitational Field of the Moon as Determined from Dynamics of Lunar Satellites.- The Use of Brown's Lunar Theory in Lunar Satellite Perturbations by Sun and Earth.- The Determination of Planetary Masses from Radio Tracking of Space Probes and Planetary Radar.- Satellite Trajectory Determination and their Expected Errors OGO-IV, GEOS-I.- Revised Values for Coefficients of Zonal Harmonics in the Geopotential.- Improved Values for the Tesseral Harmonics of the Geopotential and Station Coordinates.- On the Determination of Parameters of the Earth's Figure from Satellite Orbit Dynamics.- Accuracy of Satellite Orbits Obtainable by Synchronous Satellite Tracking.- Resonant Satellite Geodesy by High Speed Analysis of Mean Kepler Elements.- Resultats du Dépouillement des Mesures Laser en Géodésie Semi-Dynamique.- Short Arc Optical Survey of the GEOS North American Tracking Network.- Traitement des Mesures Doppler en Géodésie Semi-Dynamique.- Comparative Analysis of Different Results on the European Datum from Spatial Geodesy.- Comparisons and Combinations of Geodetic Parameters Estimated from Dynamic and Geometric Satellite Solutions and from Mariner Flights.- Tidal Potential with Location-Dependent Amplitude and Phase angle.- On the Determination of Field Parameters Using a generalized Fourier-Analysis.- Correlation Between the Solar Activity Indices and the Use of these Indices in the Study of Motion of the Earth Satellites.- New Investigations of Motion of an Artificial Satellite About its Center of Mass.- Dynamics of Spin-Stabilized Flexible Satellites of Crossed- Dipole Configuration.- Comparison of Air Densities Derived from the Orbits of 1966-51A, B and C.- The Use of AES Orbits Evolution Data for Refinement of Some Geophysical Parameters.- Analysis of the Atmospheric Drag of the Echo 1 Satellite Using the PERLO Orbital Period Determination Program.- The Upper Atmosphere and its Influence on Satellite Orbits.- Radiation Pressure Effects in the Motion of Artificial Satellites.- Air Drag and Solar Radiation Pressure Effects on Close Earth Satellites.- Effets de L'Atmosphère et de la Pression Réémise à Haute Altitude.- The Earth's Shadowing Effects in the Short-Periodic Perturbations of Satellite Orbits.- Earth-Reflected Radiation Pressure.- The Orbital Acceleration of High Balloon Satellites.- Earth Albedo Effects on the Orbital Variations of Echo I and PAGEOS I.