TY - GEN AU - Tyler,G L AU - Campbell,D B AU - Downs,G S AU - Green,R R AU - Moore,H J TI - Radar characteristics of viking 1 landing sites SN - 0036-8075 PY - 2010///0702 N1 - Publication Type: Journal Article UR - https://doi.org/10.1126/science.193.4255.812 ER -