Wittgren, H. (1988). Removal of wastewater nitrogen in a wetland filter. Universitetet i Linköping.
Citación estilo ChicagoWittgren, Hans-Bertil. Removal of Wastewater Nitrogen in a Wetland Filter. Linköping, Sweden: Universitetet i Linköping, 1988.
Cita MLAWittgren, Hans-Bertil. Removal of Wastewater Nitrogen in a Wetland Filter. Universitetet i Linköping, 1988.
Warning: These citations may not always be 100% accurate.