Improving the repeatability and reproducibility of the Helmke Drum test method
Elion, J., Ensor, D., Berndt, C., Bovino, M., Diener, R., Ely, G., Eudy, J., Giroux, R., Rataj, M., & Witt, J. (2001). Improving the repeatability and reproducibility of the Helmke Drum test method. Journal of the IEST, 44(4), 28-32.
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