Slot, R.E.; Geldof, H.J. (1986). An improved settling tube system for sand. Communications on Hydraulic and Geotechnical Engineering, 86-4. TU Delft: Delft. 45 pp.
Part of: Communications on Hydraulic and Geotechnical Engineering. Delft University of Technology. Department of Civil Engineering: Delft. ISSN 0169-6548, more