Subject
Social security
11
Criminal jurisdiction Government policy
3
Diplomatic and consular service, American Privileges and immunities
3
Employment (Economic theory) International cooperation
3
Identification numbers, Personal
3
Supplemental security income program
3
United States Foreign relations
3
United States Military relations
3
United States Politics and government
3
Universal jurisdiction Government policy
3
Aeronautics, Commercial International cooperation
2
Aeronautics, Commercial Law and legislation
2
Alcoholism Treatment
2
Astronautics International cooperation
2
COVID-19 (Disease) Transmission Prevention
2
Coronavirus infections Prevention
2
Customs administration Law and legislation
2
Diplomatic and consular service Privileges and immunities
2
Earth sciences Research International cooperation
2
Education International cooperation
2
Educational exchanges Law and legislation
2
Industrial hygiene
2
Judicial assistance
2
Mathematics
2
Mathematics Study and teaching (Elementary)
2
Number concept in children
2
Outer space Research International cooperation
2
Packing-houses Safety measures
2
Pharmaceutical services insurance Government policy
2
Poultry plants Safety measures
2
Radio Transmitters and transmission International cooperation
2
Research Law and legislation
2
Social security Law and legislation
2
Social security registration
2
Tax administration and procedure International cooperation
2
Telecommunication Law and legislation
2
United States History
2
Aeronautics, Commercial Taxation Law and legislation
1
Africa Foreign economic relations
1
African Americans
1
African Americans Civil rights History
1
Agricultural subsidies Law and legislation
1
Air travel
1
Artificial satellites Launching International cooperation
1
Artificial satellites Launching Law and legislation
1
Black people
1
Brazil Civilization
1
Brazil Commerce
1
Brazil Foreign relations
1
Brazil Military relations
1
more ...