Foreword also in French."Papers present at the international congress "Options for Tunnelling 1993" organized by the Tunnelling and Underground Works ...
"Papers present at the international congress "Options for Tunnelling 1993" organized by the Tunnelling and Underground Works Division of the Royal Institution of Engineering in the Netherlands (Klvl) and held in Amsterdam, The Netherlands, 19-22 April 1993"--p. [ii].