TY - RPRT TI - Complete Bouguer gravity anomaly map of the Roseau 1° x 2° quadrangle, Minnesota and Ontario AU - Robert Horton AU - Val W. Chandler PY - 1988 DO - 10.3133/ofr88531 UR - https://pubs.usgs.gov/publication/ofr88531 ID - ofr88531 ER -