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Scott Chilton, Dept. of Chemistry, University of Washington, Seattle, Wash. 98105 June 21 to 26—ASTM 73rd Annual Meeting and North American Mate rials Exposition. Royal York Hotel, Toronto, Ont., Canada. Contact: American Society for Testing and Ma terials, 1916 Race St., Philadelphia, Pa. 19103. 215-569-4200 June 29 to July 1—17th Annual Sym posium on Microscopy, INTER/MICRO-70. Sheraton-Blackstone Hotel, Chicago, III. Contact: Inter/Micro70, McCrone Research Institute, 451 East 31st St., Chicago, III. 60616. 312-842-7105
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