This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Von Voigt und Zuntz in Berlin um entwickeltes Fahrradergometer. de Von Voigt und Zuntz in Berlin um entwickeltes Fahrradergometer Wildor Hollmann und Theodor Hettinger Sportmedizin Auflage Schattauer Stuttgart ISBN Voigt und Zuntz PDold Uploaded with Cardiac stress test Ergometry
Page 2023 Free-images.com. All images are Public Domain