[MSDN Library June 1998] Rollback is not allowed before a pinned version (100%)
MSDN Library Visual Studio 6.0 > Visual SourceSafe Documentation > Reference Guide > Error Messages
[MSDN Library June 1998] Rollback cannot be undone; some versions will be lost irretrievably! (83.8235294117647%)
MSDN Library Visual Studio 6.0 > Visual SourceSafe Documentation > Reference Guide > Error Messages
[MSDN Library June 1998] Rollback (Command Line) (61.3952536824877%)
MSDN Library Visual Studio 6.0 > Visual SourceSafe Documentation > Reference Guide > Using the VSS Command Line
[MSDN Library June 1998] Rollback Command (60.4863221884498%)
MSDN Library Visual Studio 6.0 > Visual SourceSafe Documentation > Reference Guide > Dialogs
[MSDN Library June 1998] ROLLBACK Command (40.9334248455731%)
MSDN Library Visual Studio 6.0 > Visual FoxPro Documentation > Reference > A to Z Language Reference