SDTS question

What is the best way to import SDTS format
USGS DEMs into GRASS?

Thanks in advance,

G. Vance Justice, Jr.
Hydrologist
USDA-ARS National Sedimentation Laboratory
598 McElroy Dr.
Oxford, MS 38655

Phone: 601-232-2990
FAX: 601-232-2915
E-mail: justice@sedlab.olemiss.edu