"Clifton, George (1823-1913)". Hooker’s Australasian Collectors (Australia). jdhooker.org. Archived from the original on 27 September 2011. Retrieved 26 December 2010.
web.archive.org
"Clifton, George (1823-1913)". Hooker’s Australasian Collectors (Australia). jdhooker.org. Archived from the original on 27 September 2011. Retrieved 26 December 2010.