Logbook Phoniatrics UEMS 2010 (PDF). Union of the European Phoniatricians. 1 October 2010 [30 October 2016]. (原始内容存档 (PDF)于2016-10-30). Logbook Phoniatrics
Data Centre/The National Archives as part of the CORRAL project Digitised logbook kept by William Wales (页面存档备份,存于互联网档案馆), an astronomer, during the 1772–1775