Looking-up SBNs and ISBNs?

[John Upham]

Has anyone found a reliable and definitive means of looking up SBNs and ISBNs?

I'd like to find a bi-directional service that

goes from SBN / ISBN to publication

and

publication to SBN / ISBN

Thanks.

[Kevin Thurlow]

I asked a friend who is a librarian, and he suggests

"www.bl.uk

To search ISBNs, just enter them (without hyphens) and choose "anywhere" for fields searched."

[John Upham]

I asked a friend who is a librarian, and he suggests

"www.bl.uk

To search ISBNs, just enter them (without hyphens) and choose "anywhere" for fields searched."

Many thanks Kevin.