共 9 条
[1]
BROWN EJ, 1936, SPEC PUBL US CST GEO, V204
[2]
Bullard E. C., 1936, MON NOT R ASTR SOC S, V3, P443
[5]
BULLARD EC, 1937, MON NOT R ASTR SOC G, V4, P132
[6]
CLARK JS, 1939, PHILOS T R SOC A, V238, P65
[7]
HEYL PR, 1936, BUR STAND J RES WASH, V17, P804
[8]
KUHNEN F, 1906, VEROFF PREUSS GEODAT
[9]
MACE C, 1939, MON NOT R ASTR SOC S, V4, P476