(en) Paul F.Kerr, Isabella Milling Drew (May 1968). Quick-clay slides in the U.S.A.. Gearchiveerd op 16 december 2023. Engineering Geology Volume 2, Issue 4, May 1968, Pages 215-238
(en) Paul F.Kerr, Isabella Milling Drew (May 1968). Quick-clay slides in the U.S.A.. Gearchiveerd op 16 december 2023. Engineering Geology Volume 2, Issue 4, May 1968, Pages 215-238