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| National Association for the Practice of Anthropology (U.S.) | — |
| National Association for the Prevention of Addiction to Narcotics (U.S.) | — |
| National Association for the Study and Prevention of Tuberculosis (U.S.). | — |
| National Association for the Study and Prevention of Tuberculosis (U.S.) | — |
| National Association of Alcoholism and Drug Abuse Counselors (U.S.) | — |
| National Association of Altrusa Clubs (U.S.) | — |
| National Association of Assessing Officers (U.S.) | — |
| National Association of Bank Women (U.S.) | — |
| National Association of Boards of Examiners of Long Term Care Administrators (U.S.) | — |
| National Association of Bond Lawyers (U.S.) | — |
| National Association of Bond Lawyers (U.S.). | — |
| National Association of Business Economists (U.S.) | — |
| National Association of Catholic Chaplains (U.S.) | — |
| National Association of Catholic Chaplains (U.S.). | — |
| National Association of Claimants' Compensation Attorneys (U.S.) | — |
| National Association of College and University Attorneys (U.S.) | — |
| National Association of College and University Food Services (U.S.) | — |
| National Association of College Stores (U.S.) | — |
| National Association of Colleges and Departments of Education (U.S.) | — |
| National Association of Colleges of Mortuary Science (U.S.) | — |
| National Association of Collegiate Directors of Athletics (U.S.) | — |
| National Association of Colored Girls (U.S.) | — |
| National Association of Colored Women (U.S.) | — |
| National Association of Concessionaires (U.S.) | — |
| National Association of Congregational Christian Churches (U.S.) | — |
| National Association of Consumer Agency Administrators (U.S.) | — |
| National Association of Corporate Directors (U.S.) | — |
| National Association of Corprate Directors (U.S.) | — |
| National Association of Cost Accountants (U.S.) | — |
| National Association of Cotton Manufacturers (U.S.) | — |
| National Association of County Engineers (U.S.) | — |
| National Association of County Health Officials (U.S.) | — |
| National Association of Credit Men (U.S.) | — |
| National Association of Crime Victim Compensation Boards (U.S.) | — |
| National Association of Criminal Defense Lawyers (U.S.) | — |
| National Association of Deans of Women (U.S.) | — |
| National Association of Dental Laboratories (U.S.) | — |
| National Association of Electric Companies (U.S.) | — |
| National Association of Elementary School Principals (U.S.) | — |
| National Association of Emergency Medical Technicians (U.S.) | — |
| National Association of Finance Companies (U.S.) | — |