From: John Kitchin <jkitchin@andrew.cmu.edu>
Date: Sat, 31 Jan 2015 18:43:35 +0000 (-0500)
Subject: add isbn function
X-Git-Url: https://git.donarmstrong.com/?p=org-ref.git;a=commitdiff_plain;h=aab5f278da465b61d15e549bcfee64a80b9a2359;hp=aab5f278da465b61d15e549bcfee64a80b9a2359

add isbn function
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