d STB-49 dm67.  Numbers of missing and present values.
d STB insert by Nicholas J. Cox, University of Durham, UK.
d Support:  n.j.cox@@durham.ac.uk
d After installation, see help ^nmissing^ and help ^npresent^.

f dm67/nmissing.ado
f dm67/nmissing.hlp
f dm67/npresent.ado
f dm67/npresent.hlp