Help: read atoms into GSAS by file

[Tao]

Dear All,

When setting up refinement models in GSAS the program menu gives the
option of reading atoms into GSAS by non-GSAS file. Could anybody
kindly tell me how to setup this file (format etc.)? I need to refine a
structure with scores of atoms in the asymmetric unit and inputting them
one by one seems too low-tech :-).

Thank you very much and in advance. 

Tao
2/19/98