Catalogue of satellite observations no. c-34
Laser reflections from the Beacon Explorer satellites
Nasa to launch 2nd interplanetary explorer satellite news release no. 64-242
Initial results of the imp i magnetic field experiment
Relative advantages of small and observatory type satellites.
NASA to Launch Geodetic Satellite, First of Its Type
Relative advantages of small and observatory type satellites.
Magnetopause structure and attitude from Explorer 12 observations.
Recent NASA meteoroid penetration results from satellites
Trajectories of Explorers 33, 34 and 35, July 1966 - July 1968
The imp-i /explorer xviii/ satellite.
Remarks on the Interpretation of Lunik 10 Magnetometer Results
Observed Torque-Producing Forces Acting on Satellites