TY - RPRT TI - Sources of nitrate in water from springs and the Upper Floridan aquifer, Suwannee River basin, Florida AU - B. G. Katz AU - H.D. Hornsby AU - J.K. Bohlke PY - 1999 UR - https://pubs.usgs.gov/publication/70021045 ID - 70021045 ER -