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GET FILE='C:\\Program Files\\SPSS\\1991 U.S. General Social Survey.sav'.
N OF CASES  1		/* N OF CASES 1 is more efficient than SELECT IF $CASENUM=1 */.
FLIP.
SORT CASES BY case_lbl.
FLIP.
SELECT IF 1=0.
ADD FILES FILE=* 
  /FILE='C:\\Program Files\\SPSS\\1991 U.S. General Social Survey.sav'
  /DROP=case_lbl.
EXECUTE.