Earthquake Geotechnical Engineering Module 5a – Specification for Ground Improvement Author(s) Philip Clayton, Clive Anderson, Edwyn Ladley, Ian McPherson, Graeme Quickfall, Neil Korte, Wilhelm Degen, Nick Wharmby, Terry Wynyard, Tony Fairclough, John Scott, Darrel Cheong, Jan Kupec, Nick Harwood, Nick Traylen, Safia Moniz Published 01 November 2015 Collection NZGS Guidelines Compilation N/A