TY - RPRT TI - Quantifying Void Ratio Variation in Sand using Computed Tomography AU - Alshibli, Khalid A. AU - Batiste, Susan N. AU - Swanson, Roy A. AU - Sture, Stein AU - Costes, Nicholas C. AU - Lankton, Mark R. PY - 1999 UR - https://ntrs.nasa.gov/citations/20010069812 ID - 20010069812 ER -