| Year | 2015 |
| Date | 10-Jul |
| Volume | 215 |
| Issue | 4,512 |
| Page | 114 |
| Category | Internal Combustion |
| Part | 15 |
| Title | Internal Combustion Theory and Practice |
| Author | Ron Wright |
| Notes | A retired technical college teacher provides an in-depth course in I/C. Survey of positively driven superchargers, the Sprintex screw compressor, the spiral compressor (Volkswagen G Lader), operation |