TY - RPRT TI - Investigating Atmospheric Effects on Impact Ejecta Morphology: Possible Tool for Determining Past Climate Conditions on Mars? AU - Appleby, John F. AU - Barnouin-Jha, Oliver S. AU - Cheng, Andrew F. PY - 1999 UR - https://ntrs.nasa.gov/citations/20030068180 ID - 20030068180 ER -