Schleusener, Richard A., authorCivil Engineering Section, Colorado State University, publisher2019-07-092019-07-091961-01-15https://hdl.handle.net/10217/195689CER61RAS7.Final Report to National Science Foundation on Research.Includes bibliographical references (pages 4-5).15 January 1961.technical reportsengCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.Hail -- ColoradoHail control -- ColoradoText