A modified Nylin cardiorespiratory test employing a three-step portable staircase

C. Maurea, G. Nylin, A. Sollberger
  • American Heart Journal, February 1958, Elsevier
  • DOI: 10.1016/0002-8703(58)90127-3

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http://dx.doi.org/10.1016/0002-8703(58)90127-3