International Symposium on"Organic Maturation Studies and Fuel Exploration" International Sumposium on Interaction Studies in Nuclei,Mainz,1975 International Symposium on Protein Metabolism and Nutrition International Symposium on Dynamic Soil-Structure Interaction International Symposium on Exoelectron Emission and Applictions International Symposium on Quantum Fluids and Solids International Symposium on Statistcs and Realted Topics International Symposium on Copper Extraction and Refining International Symposium on Mathematical Phyaics and Physical Mathematics International Symposium on Stochastic Differential Equations