Huber, François New Observations on the Natural History of Bees, 1806. (English translation as published) Retrieved from transcribed copy at [1], 21 November 2011; scanned copy also available at [2] as of 21 November 2011.
Huber, François New Observations on the Natural History of Bees, 1806. (English translation as published) Retrieved from transcribed copy at [1], 21 November 2011; scanned copy also available at [2] as of 21 November 2011.