title: Space radiation:  results of the Long Duration Exposure Facility (LDEF).  Special issue.
mesh_terms: D003359:Cosmic Radiation; D005118:Extraterrestrial Environment; D018499:Linear Energy Transfer; D018551:Solanum lycopersicum; D008962:Models, Theoretical; D011834:Radiation Monitoring; D011874:Radiometry; D012639:Seeds / Q000528:radiation effects; D013026:Space Flight; D018531:Spacecraft