1. The chiropractic adjuster; a compilation of the writings of D.D. Palmer,1921
2. Chiropractic: early concepts in their historical setting;Gaucher-Peslherbe,1993
3. The chiropractor;Palmer,1914
4. Ego development: nine levels of increasing embrace;Cook-Greuter,2007
5. Constructing a philosophy of chiropractic I: an integral map of the territory;Senzon;J Chiropr Human,2010