University of Glasgow History of Art / HATII (2011). "Miss Helen Victoria Mackay". Mapping the Practice and Profession of Sculpture in Britain & Ireland 1851–1951. Archived from the original on 22 May 2022. Retrieved 26 October 2021.
University of Glasgow History of Art / HATII (2011). "Miss Helen Victoria Mackay". Mapping the Practice and Profession of Sculpture in Britain & Ireland 1851–1951. Archived from the original on 22 May 2022. Retrieved 26 October 2021.
web.archive.org
University of Glasgow History of Art / HATII (2011). "Miss Helen Victoria Mackay". Mapping the Practice and Profession of Sculpture in Britain & Ireland 1851–1951. Archived from the original on 22 May 2022. Retrieved 26 October 2021.
University of Glasgow History of Art / HATII (2011). "Miss Helen Victoria Mackay". Mapping the Practice and Profession of Sculpture in Britain & Ireland 1851–1951. Archived from the original on 22 May 2022. Retrieved 26 October 2021.