10Th International Conference on Positron Annihilation (Icpa-10), Date: MAY 23-29, 1994, Location: BEIJING, PEOPLES R CHINA, Sponsors: Int Union Pure & Appl Phys, K C Wong Educ Fdn, Hong Kong, Natl Nat Sci Fdn China, State Educ Commiss China, China Int Culture Exchange Ctr, Chinese Soc Phys, Chinese Nucl Soc, Chinese Soc Met, Chinese Mat Res Soc