Biblio
1991
J. Boll, Selker, J., Nijssen, B. M., Steenhuis, T. S., Van Winkle, J., and Jolles, E.,
“Water quality sampling under preferential flow conditions”, in
Lysimeters for Evapotranspiration and Environmental Measurements, 1991.
1990
J. Boll, Steenhuis, T. S., Selker, J., Nijssen, B. M., and Ochs, E. S.,
“Fiberglass wicks for sampling water and solutes from the unsaturated zone”,
Paper-American Society of Agricultural Engineers (USA), 1990.