How to Contribute

At this stage, the best way to contribute is to help refine the range of impressions published.

1. For any copies you have, look at the copyright page to establish ISBN, Publisher Edition, and Impression.

2. Find the entry for your copy on this website using the ISBN, Publisher Edition, and cover image.

3. See if your impression is outside the range of impressions (or known impressions) given in the entry on this website and, if so, let us know.

This will be most fruitful for those entries where there is a “known” or “possible” impression number although there may be cases where even if we give a definitive first / last impression, we are in error.

But of course, if you find any other errors, please let us know.