TY - GEN AU - James Albus AU - Hui-Min Huang AU - Elena Messina AU - Karl Murphy C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2002-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.6910 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2002 TI - 4DRCS ::a reference model architecture for unmanned vehicle systems version 2.0 ER -