The OpenStax publications look most interesting, alas, the e-mail notification f... | Hacker News

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keithpeter on Feb 7, 2012 | parent | context | favorite | on: Rice Uiversity Announces Open Source Textbooks

The OpenStax publications look most interesting, alas, the e-mail notification form will only accept US zip codes.

greenyoda on Feb 7, 2012 [–]

Not sure why that's a problem, since that field is optional.

keithpeter on Feb 7, 2012 | [–]

True, but it does 'send a message' if you see what I mean.

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