watershed delineation

Is there a program in grass4.1 that can take a Digital Elevation Map and
if you know the lat and long of a watershed outlet it will delineate the
watershed above that refrence pt. If you have any suggestions it sure
would be helpful. Thanks Again, Teresa Salyer
<salyer@tiaer.tarleton.edu>
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Teresa Salyer (Research Assistant)
<salyer@tiaer.tarleton.edu>
TIAER
Tarleton State University
Stephenville, Texas 76402