Free Download Strata Mechanics… By I.W. FARMER (Eds.) Publisher Elsevier Scientific Pub. Co 1981 ISBN 978-0-444-42086-2,0-444-42086-X,0-444-41515-7..

Free Download Seepage and Groundwater… By Miguel A. Mariño and James N. Luthin (Eds.) Publisher Elsevier Scientific Pub. Co 1982 ISBN 978-0-444-41975-0,0-444-41975-6 ..