%0 Journal Article %T Weak interlayers in flexible and semi-flexible road pavements: Part 1 %A F Netterberg %A M de Beer %J Journal of the South African Institution of Civil Engineering %D 2013 %I South African Institution of Civil Engineering %U http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1021-20192013000100012