TY - RPRT TI - Spacecraft-Doppler gravity-wave detection. II - Results AU - Hellings, R. W. AU - Callahan, P. S. AU - Anderson, J. D. AU - Moffet, A. T. PY - 1981 UR - https://ntrs.nasa.gov/citations/19810057594 ID - 19810057594 ER -