TY - RPRT TI - Estimates of long-term mean-annual nutrient loads considered for use in SPARROW models of the Midcontinental region of Canada and the United States, 2002 base year AU - David A. Saad AU - Glenn A. Benoy AU - Dale M. Robertson PY - 2018 DO - 10.3133/sir20185051 UR - https://pubs.usgs.gov/publication/sir20185051 ID - sir20185051 ER -