College students developing physical distancing app for warehouse yards2020-05-262020-05-22http://sfl2000.com/wp-content/uploads/2015/01/SFL-New-Main-logo-2.pngStephen Frederick Logisticshttps://sfl2000.com/wp-content/uploads/2010/06/Screen-Shot-2014-12-19-at-9.35.36-AM.png200px200px