David R. Nelson
Latest version of CONCH can be obtained by following this link:
CONCH.zip
Zip file contains:
1. CONCH.XLS
2. CONCH User's Manual (pdf)
3. Example Input Data Files
d.nelson [at] curtin.edu.au
CONCH has been tested extensively on numerous SHRIMP (Sensitive High Resolution Ion MicroProbe) data sets