Ralf Hotchkiss (USA)
- Whirlwind Wheelchair 152334
- Wikipedia - Ralf Hotchkiss 152335
- MacArthur Foundation: Ralf David Hotchkiss 152336
- PBS Frontline: Extended Interview with Ralf Hotchkiss 152337
- My Hero Project: Ralf Hotchkiss 152338
- Book (free online version): Independence Through Mobility (Ralf Hotchkiss) 152339
- Ralf Hotchkiss & His Whirlwind Wheelchairs - Common Dreams 24/04 152340
- Ralf Hotchkiss & Whirlwind Wheelchairs - Nader Page 07/99 152341
- Mr. Mobility / Wheelchair pioneer assembles global network of designers - SF Gate 04/99 152342