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Christoph Helsper (2)
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1979 (2)
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Evaluation of Particle Size Distributions by Means of Particle Counters / Fißan, H. J. ; Helsper, C.
(1979)
Christoph Helsper
Numerical Simulation Studies and Data Reduction for Size Classifying Measurement Techniques / Fißan, H. J.; Helsper, C.
(1979)
Christoph Helsper
;
H. J. Fißan
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