Antony Galton Ontology is not just about objects: Poorly individuated phenomena in geo-ontology. 47-52 2005 1 Applied Ontology 1 http://iospress.metapress.com/openurl.asp?genre=article&issn=1570-5838&volume=1&issue=1&spage=35 db/journals/ao/ao1.html#Galton05