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Christoph Helsper (3)
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1983 (3)
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Fachbereich Energietechnik (3)
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Verification of Ionization Chamber Theory
(1983)
Christoph Helsper
;
H. J. Fißan
;
J. Muggli
;
A. Scheidweiler
Calibration of the Polytec HC-15 and HC-70 Optical Particle Counters / Fißan, H. J. ; Helsper, C.
(1983)
Christoph Helsper
;
H. J. Fißan
Determination of Particle Size Distributions by Means of an Electrostatic Classifier / Fißan, H. J.; Helsper, C. ; Thielen, H. J.
(1983)
Christoph Helsper
;
H. J. Fißan
;
H. J. Thielen
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