"ISCRM <1989, Beijing>" . . . . . "International Symposium of Certified Reference Materials (1989 : Beijing, China)" . . . . . "Certified reference materials proceedings of ISCRM'89, May 15-18, 1989, Beijing, China"@en . "Certified reference materials" . "Certified reference materials proceedings of ISCRM'89, May 15 - 18, 1989, Beijing, China" . . . . "Certified reference materials : proceedings of ISCRM '89 : May 15-18, 1989, Beijing, China"@en . "Certified reference materials : proceedings of ISCRM '89 : May 15-18, 1989, Beijing, China" . . . . . . . . "Conference papers and proceedings" . "Conference papers and proceedings"@en . . . . . . . . . "Certified reference materials : proceedings of ISCRM'89, May 15-18, 1989, Beijing, China" . . . . . "Chinese Society for Measurement." . . "ISCRM'89 (1989 : Beijing, China)" . . . "International Symposium of Certified Reference Materials ((1989 : Beijing) (1989/05)" . . .