Important stonewort areas : an assessment of the best areas for stoneworts in the United Kingdom.
Plantlife International.
English Nature (Agency)
Back from the brink (Programme)
Salisbury : Plantlife International,
2004.
Cover title.
"April 2004"
"This project was commissioned as part of Plantlife International's species recovery programme Back from the brink with support from English Nature"
Includes bibliography.