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  • Portscht, R.
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    Wavelength Dependent Extinction Measurements for Distinguishing Between Absorbing and Non-Absorbing Aerosol Paricles.
    Aachen Technical College, Germany
    Staub-Reinhalt, Vol. 37, No. 2, 70-76, February 1977

  • Portscht, R.
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    Comparison of the Physical Measuring Principles of Smoke Detectors of Automatic Fire Alarm Systems.
    Z VFDB, Vol. 22, No. 3, 110-112, 1973 <b>AND</b> Z VFDB, Vol. 23, No. 2, 57-65, 1974,

  • Portscht, R.
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    Studies on Characteristic Fluctuations of the Flame Radiation Emitted by Fires.
    Institute of Electrical Communication Techniques, Aachen, Germany
    Combustion Science and Technology, Vol. 10, 73-84, 1975