Appendix A: Guidelines for Recording Probable and Uncertain Dates
Record probable or uncertain dates according to the patterns shown below:
1892? | Probable date |
ca. 1892 | Approximate date |
not after 1875 | Terminal date |
not before 1916 July 17 | Terminal date |
1814 or 1815 | One year or the other |
between 1906 and 1912 | A year within this time frame |
189- | Decade certain |
189-? | Probable decade |
18-- | Century certain |
18--? | Probable century |
See also:
