The Symposium on Calibration in Air Monitoring was presented atthe University of Colorado at Boulder, Colo., 5-7 Aug., 1975. Thesymposium was sponsored by The American Society for Testing andMaterials through its Committee D-22 on Methods of Sampling andAnalysis of Atmospheres. R. L. Chapman, Beckman Instruments, Inc.,presided as symposium chairman. D. C. Sheesley, Ambient Analysis,Inc., presided as symposium cochairman.