TY - RPRT TI - Propulsion Technology Assessment: Science and Enabling Technologies to Explore the Interstellar Medium AU - Hopkins, Randy AU - Thomas, Dan AU - Wiegmann, Bruce AU - Heaton, Andy AU - Johnson, Les AU - Baysinger, Mike AU - Beers, Ben PY - 2016 UR - https://ntrs.nasa.gov/citations/20160004403 ID - 20160004403 ER -