@misc{indiciaebec66bcc1b2b,
  title = {Simultaneous determination of Ca, Cu, Ni, Zn and Cd binding strengths with fulvic acid fractions by Schubert's method},
  author = {G.K. Brown and P. MacCarthy and J.A. Leenheer},
  year = {1999},
  doi = {10.1016/s0003-2670(99)00530-9},
  url = {https://pubs.usgs.gov/publication/70021402},
  note = {Source identifier: 70021402}
}