TY - RPRT TI - Orbit determination for Magellan and Pioneer 12 using same-beam interferometry AU - Folkner, W. M. AU - Engelhardt, D. B. AU - Border, J. S. AU - Mottinger, N. A. PY - 1992 UR - https://ntrs.nasa.gov/citations/19920060680 ID - 19920060680 ER -