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Author
Christoph Helsper (15)
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1985
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1984
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1983
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Calibration of the Polytec HC-15 and HC-70 Optical Particle Counters / Fißan, H. J. ; Helsper, C.
(1983)
Christoph Helsper
;
H. J. Fißan
Kalibrierung der Partikelgrößenbestimmung von optischen Partikelzählern / Fißan, H. J.; Helsper, C. ; Kasper, W.
(1984)
Christoph Helsper
;
H. J. Fißan
;
W. Kasper
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
Calibration of Optical Particle Counters with Respect to Particle Size / Fißan, H. J. ; Helsper, C.; Kasper, W.
(1984)
Christoph Helsper
;
H. J. Fißan
;
W. Kasper
Response Characteristics for Four Condensation Nucleus Counters to Particles in the 3 to 50 nm Diameter Range / Bartz, H. ; Fißan, H. J. ; Helsper, C.; Kousaka, Y. ; Okuyama, K. ; Keady, R. Fruin, S. ; McMurry, P. H.; Pui, D. Y. H. ; Stolzenburg, M. R.
(1985)
Christoph Helsper
;
H. Bartz
;
H. J. Fißan
;
Y. (u.a.) Kousaka
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15