1. Automotive News Market Data Book, Crain Communications, Inc., April 29, 1987, p 32, April 25, 1986, p 22; April 24, 1985, p 22; April 23, 1984, p 30; April 27, 1983, p 26; April 28, 1982, p 46.
2. Sample design in business research;Deming,1960
3. Risk of fatality from physical trauma versus sex and age;Evans,1986
4. A Comparison of Automatic Shoulder Belt/Knee Bolster Restraint System with the Lap and Shoulder Belt Restraint System in VW Rabbits;Highway Safety Research Center (HSRI),1981