This script adds a link to WorldCat for each "edition" on combination/separation pages. If the edition has an ISBN, it will link directly to the page for that ISBN. Otherwise, it will use the title and author values to make a link to a search with a query of the form "ti:[Title] au:[Author]" (of course, these may be fruitless searches depending on the quality of the text entered in the edition). If you run into any problems, let me know. I'm omargosh on LT.