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GRFCI

       SUBROUTINE  GRFCI (XC,YC, R, PL2)
 C$    (Circle)
 C$    Draw a  circle  on the  unit  square with  center  (XC,YC),
 C$    radius R.  PL2, normally PL2CA, moves the pen.
 C$    (06-DEC-81)