. . "Orbiter: 1971-045A" . . . "Mars 2 Orbiter" . . . . "Mars 2" . "1971-05-19" . "Prop-M" . . . . . . "Mars 2 Lander" . . . . . . . "Orbiter: 5234" . "4M No.171" . . . "Lander: 1971-045D" . . "M-71 No. 171" . . . . . . . "Prop-M Rover" . . . . . . "Mars 2 lander" . . . "Mars 2 orbiter" . . . . "Lander: 5739" . "Mars 2 Orbiter and Lander" . "Mars-2" . . . . . . . "\u2604" . "Mars 2" .