1. Some further studies of perturbations of satellites at great altitude;Fea;Planet. Space Sci.,1970
2. Diagnosis of spacecraft surface properties and dynamical motions by optical Photometry;Kissell,1969
3. Passive spin propulsion of large flexible spherically shaped satellites by the solar radiation field;Mar,1966
4. Radiation pressure effects on the acceleration of high altitude balloon satellites;Smith;Goddard Space Flight Center Document No. X-550-70-92.,1970
5. Wide band (visual spectrum) photoelectric photometry of PAGEOS during its first fifteen months in orbit;Vanderburgh,1967