A combination of two of the most comprehensive references on anchored retaining walls. Ground Anchors and Anchored Systems (Geotechnical Engineering Circular #4) discusses the design and installation of ground anchors and anchored systems. State of the Practice in the Design of Tall, Stiff, and Flexible Tieback Retaining Walls (ERDC/ITL TR-01-1) is a state-of-the-practice document which describes and design tieback walls and evaluate wall performance. A unique combination from two seaprate agencies.