Published biographical information on Joseph Alexander Mackay: Director of Nepean Co-operative Dairy and Refrigerating Society Ltd (1945 - 1948) - Member of the Milk Zone Dairymen's Council - Alderman of St Marys Municipal Council (1945 -1948) - Mayor (1946) - Penrith Municipal Council (1949 - 1950). Sydney Morning Herald (7 February 1964) - Death certificate of Joseph Alexander Mackay (1964) - Death certificate of the father of Joseph Alexander Mackay (1918) - Transcription of marriage certificate (1942) - political pamphletts - Bayley Park
