TY - CHAP A1 - Stepkes, Hermann A1 - Zimmermann, J. A1 - Müller, Karsten A1 - Siekmann, Marko A1 - Pinnekamp, Josef T1 - Economical rehabilitation of sewer systems by ground penetration radar investigations T2 - Strategic asset management of water supply and wastewater infrastructures : invited papers from the 2nd IWA Leading Edge Conference on Strategic Asset Management (LESAM), Lisbon, October [17 - 19] 2007 / ed. by Helene Alegre and Maria do Céu Almeida Y1 - 2007 SN - 9781843391869 SP - 501 EP - 520 PB - IWA Publ. CY - London ER -