All 2 Richard Mainwaring releases on Bog med hård ry...mslag
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Release September 10, 2026
![Cover for Richard Mainwaring · Everybody Hertz: The Amazing World of Frequency, from Bad Vibes to Good Vibrations (Hardcover Book) [Main edition] (2022)](https://imusic.b-cdn.net/images/item/original/426/9781788165426.jpg?richard-mainwaring-2022-everybody-hertz-the-amazing-world-of-frequency-from-bad-vibes-to-good-vibrations-hardcover-book&class=scaled&v=1641658490)