Crusades
| Author(s) | Title | Reference | |
|---|---|---|---|
| Joseph Needham | Giles of Rome and the Medieval Theory of Conception; a Study of the 'De Formatione Corporis Humant in Utero', by M. Anthony Hewson | 46/1, p. 132 | |
| M.R. Morgan | What Were the Crusades?, by Jonathan Riley-Smith | 49/1, p. 170 |