Links from isbn.nu

Relevant links from domain.

url / atext / target url	PR	score	semantic flow ™	on topic	referring domains	external backlinks
http://isbn.nu/whatsanisbn.html r r bowker in the united states ↳http://www.bowker.com/standards/home/isbn/us/isbnus.html	0.28	1	0.08	-	1	1	url -> links from bowker.com www.bowker.com