author = { Water Environment Federation },

title = { Upgrading and retrofitting water and wastewater treatment plants },

publisher = {McGraw-Hill},

isbn = {0071453032},

keywords = { Sewage disposal plants Upgrading , Sewage disposal plants Retrofitting , Water treatment plants Upgrading , Water treatment plants Retrofitting },

year = {2005},

booktitle = {WEF manual of practice ; no. 28},

booktitle = {WEF Press},

address = { New York },

url = { http://slubdd.de/katalog?TN_libero_mab2 }