1. England v Louisiana State Board of Medical Examiners, 263 F.2d 661 (US Circ 1959).
2. Chiropractic Principles and Technic: For Use by Students and Practitioners;Biron,1939
3. Chiropractic Principles and Technic: For Use by Students and Practitioners;Janse,1947
4. Chiropractic: History and Evolution of a New Profession;Wardwell,1992
5. Wilk v American Medical Ass'n, 719 F.2d 207 (7th Cir 1983).