| X Rays and Crystal Structure by Sir William Henry Bragg, Sir William Lawrence Bragg - 1918 - 228 pages |
| X rays and crystal structure by Sir William Henry Bragg, Sir William Lawrence Bragg - 1918 - 228 pages |
| X-rays and Crystal Structure by Sir William Henry Bragg, Sir William Lawrence Bragg - 1918 - 288 pages |
| Xavier de Maistre by Alfred Berthier - 1918 - 381 pages |
| Xenophon ... by Xenophon - 1918 |
| Xenophon ... by Xenophon - 1918 |
| Xenophon ... by Xenophon - 1918 |
| Xenophon ... by Xenophon - 1918 |
| Xi Psi Phi Quarterly - 1918 |
| Xin hua mi ji by Zhiyan Xu - 1918 |
| Xu yuan chang he ji by Tianxuwosheng - 1918 |