The first morning song of some birds of Washington, DC; Its relation to light

[1] ABBE C, 1916, MONTHLY WEATHER REV, V44, P620

[2] Bird migration from the point of view of light and length of day changes [J]. AMERICAN NATURALIST, 1928, 62 : 385 - 408

[3] Allen F. H., 1913, Auk Cambridge Mass, V30

[4] ALLEN FH, 1922, J AM MUSEUM, V22, P235

[5] Allen G.M., 1925, BIRDS THEIR ATTRIBUT

[6] Arnold E., 1912, Auk, V29

[7] BLAKE SF, 1928, CONDOR, V30, P249

[8] CLEVELAND A, 1916, US MONTHLY WEATHER R, V44, P623

[9] COOKE WW, 1910, MIGRATORY MOVEMENTS

[10] DEMAIRAN JJD, 1754, REV AUGEMENTEE PLUSI

[1] ABBE C, 1916, MONTHLY WEATHER REV, V44, P620

[2] Bird migration from the point of view of light and length of day changes [J]. AMERICAN NATURALIST, 1928, 62 : 385 - 408

[3] Allen F. H., 1913, Auk Cambridge Mass, V30

[4] ALLEN FH, 1922, J AM MUSEUM, V22, P235

[5] Allen G.M., 1925, BIRDS THEIR ATTRIBUT

[6] Arnold E., 1912, Auk, V29

[7] BLAKE SF, 1928, CONDOR, V30, P249

[8] CLEVELAND A, 1916, US MONTHLY WEATHER R, V44, P623

[9] COOKE WW, 1910, MIGRATORY MOVEMENTS

[10] DEMAIRAN JJD, 1754, REV AUGEMENTEE PLUSI