| July 2, 2021 | Edited by Charles Horn | merge authors |
| September 30, 2020 | Edited by MARC Bot | add ISNI |
| March 31, 2017 | Edited by MARC Bot | add VIAF and wikidata ID |
| September 24, 2008 | Edited by ImportBot | Found a matching record from University of Toronto . |
| August 18, 2008 | Edited by an anonymous user | fix author name |