Unknown book issue

[Stephen]

http://www.goodreads.com/book/show/75...

Is clearly an edition of http://www.goodreads.com/book/show/29...

yet both appear on this list
http://www.goodreads.com/list/show/11...

Can the unknown version be merged into another, known version? Should one of the versions be removed from this list?

I rescued a number of unknown books when I had them but this is one that I read in childhood.

[Paula]

Rescued and merged with correct edition