ロード中…
記述事項: | Shows the forces acting in the human body in water-buoyancy, gravity, resistance and propulsion-and their effects on both the beginner and the competitive swimmer. |
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物理的記述: | Videocassette (VHS)(ca. 20 min.) :sd., col., 1/2 in. |
記述事項: | Shows the forces acting in the human body in water-buoyancy, gravity, resistance and propulsion-and their effects on both the beginner and the competitive swimmer. |
---|---|
物理的記述: | Videocassette (VHS)(ca. 20 min.) :sd., col., 1/2 in. |