TY - RPRT TI - Filed emission cathodes for electrodynamic tethers: identifying compatible cathode materials AU - Marrese, C. AU - Polk, J. AU - Mackie, B. AU - Quinlan, M. AU - Koel, B. PY - 2002 UR - https://ntrs.nasa.gov/citations/20060030699 ID - 20060030699 ER -