A STUDY OF THE ORION AGGREGATE OF EARLY-TYPE STARS

[21] MORGAN WW, 1951, PUB OBS U MICHIGAN, V10

[22] PICKERING, 1917, 205 HARV CIRC

[23] A STUDY OF THE CONCENTRATION OF EARLY-TYPE STARS IN CYGNUS [J]. ASTROPHYSICAL JOURNAL, 1951, 114 (03) : 492 - &

[24] ROSS, 1934, ATLAS MILKY WAY

[25] ON THE DENSITY DISTRIBUTION AND CHEMICAL COMPOSITION OF THE INTERSTELLAR GAS [J]. ASTROPHYSICAL JOURNAL, 1948, 108 (02) : 242 - 275

[26] STRUVE, 1936, AP J, V84, P219

[27] VANDEHULST, 1949, UTRECHT PUB, V11

[28] WHITFORD, 1945, AP J, V102, P318

[29] AN EXTENSION OF THE INTERSTELLAR ABSORPTION-CURVE [J]. ASTROPHYSICAL JOURNAL, 1948, 107 (01) : 102 - 105

[30] 1946, PUB ASP, V58, P356

[21] MORGAN WW, 1951, PUB OBS U MICHIGAN, V10

[22] PICKERING, 1917, 205 HARV CIRC

[23] A STUDY OF THE CONCENTRATION OF EARLY-TYPE STARS IN CYGNUS [J]. ASTROPHYSICAL JOURNAL, 1951, 114 (03) : 492 - &

[24] ROSS, 1934, ATLAS MILKY WAY

[25] ON THE DENSITY DISTRIBUTION AND CHEMICAL COMPOSITION OF THE INTERSTELLAR GAS [J]. ASTROPHYSICAL JOURNAL, 1948, 108 (02) : 242 - 275

[26] STRUVE, 1936, AP J, V84, P219

[27] VANDEHULST, 1949, UTRECHT PUB, V11

[28] WHITFORD, 1945, AP J, V102, P318

[29] AN EXTENSION OF THE INTERSTELLAR ABSORPTION-CURVE [J]. ASTROPHYSICAL JOURNAL, 1948, 107 (01) : 102 - 105

[30] 1946, PUB ASP, V58, P356