2014 Microtunneling Supplement
2014 Pipe Relining Guide2014 Horizontal Directional Drilling Guide2013 Microtunneling Supplement2013 Pipe Relining Guide2013 Horizontal Directional Drilling Guide
2012 Microtunneling Supplement
2012 Horizontal Directional Drilling Guide
2011 Microtunneling Supplement
2011 Horizontal Directional Drilling Guide
2010 Pipe Materials Guide
2009 Lateral Rehabilitation Guide
2008 Manhole Supplement