1. They spoke… have we listened?;Phillips;J Chiropr Humanit,2001
2. A lesson in history: The need for research;Phillips;Success Express,1988
3. Is chiropractic unity possible?;Watkins;Nat Chiropr J,1946
4. Basic principles of curriculum and instruction;Tyler,1949
5. The development of scientific attitudes;Haney;Sci Teach,1964