Patterns in Stonework: The Early Church in Britain and Ireland An introduction to ecclesiastical geology Potter, John F. Heftet / 2009 / Engelsk
Searching for Early Welsh Churches A study in ecclesiastical geology Potter, John F. Heftet / 2013 / Engelsk
Patterns in Stonework: The Early Churches in Northern England A further study in ecclesiastical geology Part B: The Counties of Northumberland, Nottinghamshire, Staffordshire, Westmorland and Yorkshire Potter, John F. Heftet / 2016 / Engelsk
Medieval Town Wall of Great Yarmouth, Norfolk, U.K. A geological perlustration Potter, John F. Heftet / 2008 / Engelsk
Patterns in Stonework: The Early Churches in Northern England A further study in ecclesiastical geology Part A: The Counties of Cheshire, Cumberland, Derbyshire, Durham, Lancashire and Lincolnshire Potter, John F. Heftet / 2015 / Engelsk
