Here is the only other way (with minimum) effor that I can think to do it:

SELECT Cl_Ref, MIN(R.Re_Time) ;
  FROM Referral R;
 WHERE BETWEEN(DTOS(R.Re_Date), "20010101", "20010201");
 GROUP BY Cl_Ref, Re_Date 
  INTO CURSOR Minimums NOFILTER

SELECT *;
  FROM Referral;
 WHERE BETWEEN(DTOS(Re_Date), "20010101", "20010201");
   AND Re_Time = (SELECT min_re_time ;
   		    FROM Minimums;
   		   WHERE Minimums.Cl_Ref = Referral.Cl_Ref) ORDER BY Cl_Ref

If anyone can think of another way, please let me know.

Thanks
Kev