4E4. Approximate dates (Distribution, Release, Broadcast Area - Dates of distribution, release, broadcast)
If no date of distribution, release, broadcast, copyright, or production can be determined, give an approximate date enclosed in brackets. If necessary, give an explanation in a note. See 7B11.
Probable date |
[1969] |
Questionable date |
[1916?] |
Approximate date |
[ca. 1960] |
One year or another |
[1971 or 1972] |
Span of dates |
[between 1906 and 1912] |
Probable decade |
[192-] |
Questionable decade |
[192-?] |
See also: