_Ex._ Me DuCit ChrIstVs = 1704.
188. When the place or date is given falsely, whether intentionally or
by a typographical error, add the true place or date in brackets, if it
can be ascertained.
_Ex._ London, 1975 [1775]. O. Boston, 1887 [1886]. O.
Paris, 1884 [mistake for 1874]. O. En Suisse [Paris], 1769.
189. When the place or date is not given, supply it in brackets, if
it can be ascertained. If neither is discoverable, write _n. p._ (=no
place), _n. d._ (=no date), to show that the omission of place and date
is not an oversight.
_Ex._ _n. p._, _n. d._ O.
190. But avoid _n. d._, and if possible give the decade or at least the
century, even if an interrogation point must be added.
_Ex._ London, [17—]. Q.
Phila., [182–?] O.