Concepedia
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Publications
1
Citations
65
H-Index
Active since
1984
JA Helfrich is an author specializing in chemistry, sampling, and sample preparation.
Publications per year
1984–1984
A Laboratory Evaluation of Ground Water Sampling Mechanisms
M. J. Barcelona, JA Helfrich, Edward E. Garske et al. · Groundwater Monitoring & Remediation · 1984 · 65 citations
Natural Sciences, Chemistry, Analytical Chemistry +11
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