[NTG-context] Can't make ISBN print in bibliography

Still having trouble with that pesky ISBN field in my bibliography. The file makes it to the book.bbl file but never prints no matter what .bst file I reference. Here is an extract from the generated book.bbl file: \startpublication[k=Bah2011,t=book, a={{Bah}},y=2011, n=4,s=Bah11] \author[]{Tavmjong}[T.]{}{Bah} \pubyear{2011} \title{Inkscape: Guide to a Vector Drawing Program} \isbn{978-0-13-27641-8} \city{Upper Saddle River, NJ} \pubname{Prentice-Hall} \stoppublication Any suggestions? Using MKIV currently. -- John Culleton Wexford Press Free list of books for self-publishers: http://wexfordpress.net/shortlist.html PDF e-book: "Create Book Covers with Scribus" available at http://www.booklocker.com/books/4055.html