Always scan files from unknown sources with antivirus software, as archive formats can sometimes be used to distribute malware. Do you have the other parts of this archive , or
: Right-click on the first file ( CGP.7z.001 ) and select "Extract". The software will automatically pull data from the .003 part to complete the process.
: Large datasets of bibliographic records often distributed in zipped formats.
: Ensure CGP.7z.001 , CGP.7z.002 , and CGP.7z.003 are all in the same directory. Use 7-Zip : Download and install the 7-Zip archiver.
You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip.