descriptions of each town, parish, manor, and extra-parochial liberty (arg. Publicdomain). T. Snape.CS1 maint: ref=harv (link) Burke, John; Burke, Bernard (1847)
Lessig, Hal Abelson, ac Eric Eldred gyda chefnogaeth the Center for the PublicDomain. Sgwennwyd yr erthygl gyntaf am Comin Creu gan Hal Plotkin yn Chwefror
Publishing. t. 173. ISBN 978-1-84720-921-4. Boyle, James (2008). The PublicDomain: Enclosing the Commons of the Mind. CSPD. t. 38. ISBN 978-0-300-13740-8