TY - RPRT TI - A simple method for obtaining a three-dimensional proton distribution function from Voyager plasma data AU - Olbert, S. AU - Jessen, J. AU - Belcher, J. W. AU - Lazarus, A. PY - 1978 UR - https://ntrs.nasa.gov/citations/19790015671 ID - 19790015671 ER -