Names Applied to Bees of the Genus Nomada, Found in North AmericaTheodore Dru Alison Cockerell · First published 2018Open the Tome
Bees of the family Hylaeidae from the Ethiopian regionTheodore Dru Alison Cockerell · First published 1942Open the Tome
The bees of the Southern California islandsTheodore Dru Alison Cockerell · First published 1939Open the Tome
African bees of the genera Ceratina, Halictus and MegachileTheodore Dru Alison Cockerell · First published 1937Open the Tome
Fossil insects in the United States National museumTheodore Dru Alison Cockerell · First published 1925Open the Tome
Plant and insect fossils from the Green River Eocene of ColoradoTheodore Dru Alison Cockerell · First published 1925Open the Tome
A fossil cichlid fish from the Republic of HaitiTheodore Dru Alison Cockerell · First published 1924Open the Tome
Biographical memoir of Alpheus Spring Packard, 1839-1905Theodore Dru Alison Cockerell · First published 1920NonfictionOpen the Tome
Land shells from the Tertiary of WyomingTheodore Dru Alison Cockerell · First published 1914Open the Tome
Fossil insects from Florissant, ColoradoTheodore Dru Alison Cockerell · First published 1908Open the Tome
The fossil flora of Florissant, ColoradoTheodore Dru Alison Cockerell · First published 1908Open the Tome
Fossil Hymenoptera from Florissant, ColoradoTheodore Dru Alison Cockerell · First published 1906Open the Tome
