| title | media type | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|---|
| Charles Darwin's Letters: A Selection 1871-1882 | Hardcover | 978-0-521-87413-7 (0-521-87413-0) | 2015 | Frederick Burkhardt · Alison Pearn |
| Evolution: Selected Letters of Charles Darwin 1860-1870 | Printed Access Code | 978-0-511-54259-6 (0-511-54259-3) | 2009 | Frederick Burkhardt · Alison M. Pearn |
| Evolution: Selected Letters of Charles Darwin 1860-1870 | Hardcover | 978-0-521-87412-0 (0-521-87412-2) | 2008 | Frederick Burkhardt · Alison M. Pearn |