Posted by Nosferatumyia on 04-11-2010 19:47
#3
The square brackets are used if the year of publication or name of the author are esablished
from indirect evidences, say, certainly after 1779 but certainly before 1781; title page contains no year.
Usually this information is useful in big catalogues only, but
redundant elsewhere; as an editor of a faunistic lists, I insist omitting them at all.