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John Joseph Wittkopf
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Dielectric properties of Ponderosa pine at high frequencies
John Joseph Wittkopf · Engineering Experiment Station, Oregon State System of Higher Education, Oregon State College
19 sayfa · 1949
Dielectrics / Ponderosa pine
Dielectric properties of Douglas fir at high frequencies
John Joseph Wittkopf · Engineering Experiment Station, Oregon State System of Higher Education, Oregon State College
35 sayfa · 1949
Dielectrics / Testing / Wood / Electric conductivity / Douglas fir