University Press ISBN 978-0-19-956502-3 Chapman, D. (2012). What's in an Urn?, Concept, ISBN 978-1291143119 Colvin, Sidney (1917). John Keats: His Life and Poetry
1819. Chicago: University of Chicago Press. 1998. ISBN 0-226-10108-8. Colvin, Sidney. John Keats: His Life and Poetry. London: Macmillan. 1917. OCLC 257603790
Robin D. Obituary: Winifred May Watkins (1924–2003) (PDF). Biochemical Society. [2019-04-24]. (原始内容存档 (PDF)于2015-09-23). Desmond Seward. John Colvin. The