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The Annals of Occupational Hygiene|June 15, 1999
The effects of strapped spectacles on the fit factors of three manufactured brands of full facepiece negative pressure respiratorsT M Spear, R Hardgrove, J B Norman, et al.Applied Optics|November 10, 2010
Photorefractive integrator characterizationJ H Hong, J B Norman, T Y Chang, et al.Pageof 1