| http://www.w3.org/ns/prov#value | - Dr. Billings has given lectures throughout the country for universities, private organizations, national conferences and the military on such topics as Combat Stress, Reality Therapy, Choice Theory Psychology, Vibroacoustic Disease, Skill Development, Psychology of Disability, Management Theory, Stress and Burn-out, Violence in The Work Place, Rapid Response Human Service Programs, Health and Nutr
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