Wigginton, M. J., & Graham, G. G. (1981). Guide to the identification of some of the more difficult vascular plant species : with particular application to the Watsonian vice-counties 66-70, Durham, Northumbria and Cumbria / M.J. Wigginton, G.G. Graham: With particular application to the Watsonian vice-counties 66-70, Durham, Northumbria and Cumbria. Nature Conservancy Council.
Chicago Style (17th ed.) CitationWigginton, M. J., and G. G. Graham. Guide to the Identification of Some of the More Difficult Vascular Plant Species : With Particular Application to the Watsonian Vice-counties 66-70, Durham, Northumbria and Cumbria / M.J. Wigginton, G.G. Graham: With Particular Application to the Watsonian Vice-counties 66-70, Durham, Northumbria and Cumbria. Banbury: Nature Conservancy Council, 1981.
MLA (9th ed.) CitationWigginton, M. J., and G. G. Graham. Guide to the Identification of Some of the More Difficult Vascular Plant Species : With Particular Application to the Watsonian Vice-counties 66-70, Durham, Northumbria and Cumbria / M.J. Wigginton, G.G. Graham: With Particular Application to the Watsonian Vice-counties 66-70, Durham, Northumbria and Cumbria. Nature Conservancy Council, 1981.