imprint date versus copyright date

[lcerrato]

Noticed when researching texts for a user that we often use a date of last printing for works. This is confusing, since this appears to be a copyright date. Header info should be reviewed, particularly for Loeb editions falling into the post 1922 era, and dates should clearly represent the info from the book.

For example:
http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.01.0168
Plato. Plato in Twelve Volumes, Vols. 5 & 6 translated by Paul Shorey. Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1930-1942 (reprint 1969).

http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.01.0170
Plato. Plato in Twelve Volumes, Vol. 1 translated by Harold North Fowler; Introduction by W.R.M. Lamb. Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1914 (1966 reprint).

http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.01.0178
Plato. Plato in Twelve Volumes, Vol. 3 translated by W.R.M. Lamb. Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1924 (1967 reprint).