Biblio
Conference Paper
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.
Journal Article
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.