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Ubercart doesn't have built-in the ability to make one version shippable and the other not. So I ended up writing some custom code that says:
Centre for Environment Education
Worldwatch Institute, USA
Go to the Create Content page and select Partner. Enter in the relevant details for the partner and save the page.
Navigate to the Press page and hover your mouse over the top right corner of the block until you see the edit symbol (the gear icon).
Navigate to the publication's page, scroll to the Authoring section at the bottom of the page, and then edit the date to correct it.