*EIN BEITRAG ZUR FRAGE DER ARBEITSTEILUNG IM BIENENSTAAT

[1] ARNHARDT L, 1931, ARCH BIENENKDE, V12

[2] BAERENDS GP, 1941, TIJDSCHR ENTOMOL, V84

[3] BEECKEN M, 1934, ARCH BIENENKDE, V15

[4] BERNARD F, 1951, TRAITE ZOOLOGIE, V10

[5] BETTS AD, 1935, BEE WORLD, V16

[6] BEUTLER R, 1930, Z VERGL PHYSL, V12

[7] BUTLER CG, 1945, J ROY SOC ARTS, V93

[8] BUTLER CG, 1949, HONEYBEE

[9] CASTEEL DB, 1912, 161 US BUR ENT CIRC

[10] DREHER K, 1936, ZOOL ANZ, V113

[1] ARNHARDT L, 1931, ARCH BIENENKDE, V12

[2] BAERENDS GP, 1941, TIJDSCHR ENTOMOL, V84

[3] BEECKEN M, 1934, ARCH BIENENKDE, V15

[4] BERNARD F, 1951, TRAITE ZOOLOGIE, V10

[5] BETTS AD, 1935, BEE WORLD, V16

[6] BEUTLER R, 1930, Z VERGL PHYSL, V12

[7] BUTLER CG, 1945, J ROY SOC ARTS, V93

[8] BUTLER CG, 1949, HONEYBEE

[9] CASTEEL DB, 1912, 161 US BUR ENT CIRC

[10] DREHER K, 1936, ZOOL ANZ, V113