Merging bibtex files

Even though I strive to work with a single bibtex file for all my papers and books, using a symbolic link to the mother biblio.bib file in each paper directory, it happens now and then that local biblio.bib files get a life of their own! So this morning I cleaned up my computer by replacing all mutant biblio.bib files by the mother file, but I had first to make sure all local references had been included in this single file. There are certainly many ways to do so but I found using kbibtex, a bibtex editor for KDE, fairly painless and efficient.