glio Nazionale delle Ricerche and the U.S. National Bureau of Standards on Instrumentation and Standards for the Physical and Chemical Characterization of Particulate Matter. The author acknowledges the assistance of Mr. G. Calogero for the experimental set-up and the field measurements and Mr. V. DiPalo for atomic absorption measurements.
Literature Cited(1) Van De Hulst, H. C. "Light Scattering by Small Particles,"; Wiley:
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