1. Almich, B., Solomon, M. and Carson, G. 1975.A Theoretical and Laboratory Evaluation of a Portable Direct-reading Particulate Mass Instrument76–114. DHEW (NIOSH) Report
2. Evaluation of fast response aerosol mass monitors
3. Tomb, T. F. and Gero, A. J.Development of a Machine-Mounted Respirable Coal Mine Dust Monitor647–663. Ibid.