1. Adam, Robert Moyes. 1948. Scotland: Rivers and Streams. Edinburgh: Hopetoun Press.
2. Anon. 1839. The History of Insects. The Religious Tract Society.
3. Atkins, Anna. 1843–1853. British Algae: Cyanotype Impressions, 3 vols., privately published, Halstead Place, UK.
4. BAAS. 1884–1914. Reports of the Meeting of the British Association for the Advancement of Science. London: J. Murray.
5. Bahr, P.H. 1908. A Study of the Home Life of the Osprey. British Birds 1 (17–22): 40–43.