共 43 条
[1]
BOK BJ, 1937, DISTRIBUTION STARS S, P58
[2]
*NAT OBS PRAG, 1929, PUB NAT OBS PRAG, V6
[3]
*PERK OBS, 1939, CONTR PERK OBS, V13
[4]
*STOCKH OBS, 1933, STOCKH OBS ANN, V11
[5]
*UPS ASTR OBS, 1939, UPS ASTR OBS ANN
[6]
*UPS ASTR OBS, 1941, UPS ASTR OBS ANN
[7]
1939, AP J, V90, P209
[8]
1936, GRONINGEN PUB, V47
[9]
MT W CONTR, V458
[10]
1934, HARVARD CIRC, V396