Item number 1310185,
This is one of the handiest chord charts for mountain dulcimer that we've found! it is only two pages (laminated card stock, 8 1/2" x 11", printed on both sides), but it is full of useful information. This chart has all the main chord shapes (bar, "L", slant, extended slant) for the most common chords (D, G, A, C, Em, F#m, and Bm). Each chord is shown graphically on a fretboard diagram, in multiple locations on the fretboard.