| Title: | "If Youth But Knew!" |
| Author: | Castle, Agnes, d. 1922 |
| Author: | Castle, Egerton, 1858-1920 |
| Illustrator: | Speed, Lancelot, 1860-1931 |
| Note: | New York: Macmillan, 1906 |
| Link: | multiple formats at archive.org |
| Stable link here: | http://onlinebooks.library.upenn.edu/webbin/book/lookupid?key=olbp43557 |
| Call number: | PR6005 .A8 I5 |