My copy editor wants me to create a second bibliography for photo/illustration references.

I'm using basic code to make a bibliography:

\usemodule[publ-imp-sbl]

\usebtxdataset[default][~/Commons/sources.bib]

\setupbtx[dataset=default]
\usebtxdefinitions[sbl]
\setupbtx[sbl]

\starttext
      \input knuth
       \cite[authoryear]

        \startchapter[title=Bibliography]
            \placelistofpublications
        \stopchapter
\stoptext

I know how to create custom lists and indexes, but not a bibliography list.

How do I point the image references to go to a different list, but still its a bibliography?

        \startchapter[title=Image Credits]
            \placelistofcredits
        \stopchapter

--Joel