The spectrum of the night sky

[11] 1940, ANN PHYS, V13, P1

[12] 1938, AP J, V88, P173

[13] 1939, AP J, V90, P301

[14] 1939, AP J, V90, P309

[15] 1938, Z AP, V15, P154

[16] 1938, ANN AP, V1, P381

[17] 1938, AP J, V87, P559

[18] 1939, AP J, V89, P517

[19] 1940, AP J, V91, P91

[20] 1939, PUB ASP, V51, P47

[11] 1940, ANN PHYS, V13, P1

[12] 1938, AP J, V88, P173

[13] 1939, AP J, V90, P301

[14] 1939, AP J, V90, P309

[15] 1938, Z AP, V15, P154

[16] 1938, ANN AP, V1, P381

[17] 1938, AP J, V87, P559

[18] 1939, AP J, V89, P517

[19] 1940, AP J, V91, P91

[20] 1939, PUB ASP, V51, P47