Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'IngénieurApril 1992, Volume 45, Issue 1, pp 71–72 | Cite asConclusionsAuthorsAuthors and affiliationsM. RatArticle 17 Downloads This is a preview of subscription content, log in to check access.Copyright information© International Association of Engineering Geology 1992Authors and AffiliationsM. Rat11.Laboratoire Central des Ponts et ChausséesParis Cedex 15