1997
1997
1997
ELSEVIER The Science of the Total Environment 201 (1997) 279-280
1997
Ash and metal free humic acids.
1997
1997
1997
1997
Isolation of humic acid from the terrestrial plant< i> Brugmansia sanguinea</i>
1997
Metal-humic acid interactions: a dissertation
1997
Immobilization of cells using electrostatic droplet generation