International Symposium on Shock Tubes and Waves Boye Ahlborn., (Seattle)International Symposium on Shock Tubes and Waves Treanor, (Niagara Falls,N.Y.)International Symposium on Shock Tubes and Waves International Symposium on rock mechanics (Tokyo)International Symposium on Rockets and Astronautics International Symposium on Prostaglandins Lectures international symposium on macromolecular chemistry 1st International symposium on ramie prifession International Symposium on Livestock Wastes International Symposium on Quantum Fluids and Solids