Found in articles
American History 2004 91(3): 829-846. in History Cooperative[nefuncțională] Hutton, T. R. C. "Beating a Dead Horse: the Continuing Presence of Frederick Jackson
ISSN 0035-9149. PMID 19244920. Heberden, E. (aprilie 1985). „Correspondence of William Heberden, F.R.S. with the Reverend Stephen Hales and Sir Charles Blagden”