@article{94405, note = {"Secretariat background paper no. 11".}, url = {http://digitallibrary.un.org/record/94405}, title = {Advanced treatment units for sewage and waste water in the ECE region : note /}, publisher = {UN,}, recid = {94405}, pages = {6 p. :}, address = {Geneva :. 1986-06-04}, year = {1986}, month = {Jun}, }