Niine, R., E. Loigu, and K. Pachel. “COMPLIANCE OF WASTEWATER TREATMENT PLANTS IN JÄRVA COUNTY WITH THE EU URBAN WASTEWATER TREATMENT DIRECTIVE AND ESTONIAN NATIONAL REQUIREMENTS”. European Scientific Journal, ESJ, Vol. 9, no. 21, July 2013, doi:10.19044/esj.2013.v9n21p%p.