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- Archer, M.E.
The Wasps, Ants and Bees of Watsonian Yorkshire. YNU. (2002)
- Edwards, R.
Provisional atlas of Aculeate Hymenoptera - Part3 BRC. (2001)
- Halifax Birdwatchers Club
Halifax Birdwatchers Club Annual Report (1994 – 2000)
- Halifax Scientific Society
Natural History of Calderdale. (1978 – 2000)
- Henderson, A (ed)
The Bulletin YNU. (1980 –2002)
- Knight, D.
(Pers Com). (2002)
- Lavin, J.C. & Wilmore, G.T.D.
The West Yorkshire Plant Atlas City of Bradford. (1994)
- Morley, I.
Vertebrate Fauna of the Halifax Parish. Halifax Scientific Society. (1965)
Red and Amber List, Birds at risk. (2002)
- Seward, (Ed)
The Naturalist YNU. (1950 - 2002)
- Selman, R., Dodd, F. and Bayes, K.
A Biodiversity Audit of Yorkshire and the Humber Yorkshire and Humber Biodiversity Forum. (1999)
- Wigginton, M.J.
British Red Data Books 1 Vascular Plants JNCC. (1999)