#2894 Averaged boundaries for Martian polar hood clouds during northern and southern winters Martin, Leonard J · 1976 #2803 Mars - 1967 1: 25 000 000 Inge, Jay L · 1975 #2804 Mars 1975-76 1: 25 000 000 Inge, Jay L · 1975 #2805 Mars-1967 Lowell Observatory Map Capen, Charles F · 1975 #2711 Mars-1973 Lowell Observatory Map 1: 25 000 000 Capen, Charles F · 1974 #1982 Map showing the development of Mars' great storm from day 8 to day 17 Capen, Charles F · 1972 #1821 Mars-1969 Lowell Observatory 1: 35 200 000 Inge, Jay L · 1971 #1822 Mars-1971 1: 25 000 000 Inge, Jay L · 1971 #1160 The Martian Surface Capen, Charles F · 1967