BLUE CLEARING DURING THE 1960-61 MARS APPARITION

[1] PHOTOGRAPHIC OBSERVATIONS IN 1956 OF THE BLUE CLEARING ON MARS [J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1957, 69 (411) : 530 - 532

[2] KUIPER GP, 1952, ATMOSPHERES EARTH PL, P389

[3] OBSERVATIONS OF MARS MADE AT MOUNT WILSON IN 1954 [J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1955, 67 (395) : 62 - 73

[4] SLIPHER EC, 1937, PUBL ASTRON SOC PAC, V49, P137

[1] PHOTOGRAPHIC OBSERVATIONS IN 1956 OF THE BLUE CLEARING ON MARS [J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1957, 69 (411) : 530 - 532

[2] KUIPER GP, 1952, ATMOSPHERES EARTH PL, P389

[3] OBSERVATIONS OF MARS MADE AT MOUNT WILSON IN 1954 [J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1955, 67 (395) : 62 - 73

[4] SLIPHER EC, 1937, PUBL ASTRON SOC PAC, V49, P137