100.000+ autores registrados con U · página 136
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| U.S. Relief Commission in Europe, 1914. | — |
| Religion and Labor Foundation (U.S.) | — |
| Religious Coalition for Abortion Rights (U.S.) | — |
| Religious Speech Communication Association (U.S.) | — |
| Republican Coordinating Committee (U.S.) | — |
| Republican National Committee (U.S.). | — |
| Republican National Committee (U.S.) | — |
| Republican National Committee (U.S.). | — |
| Research and Engineering Council of the Graphic Arts Industry (U.S.) | — |
| Research and Special Programs Administration. Transportation Dept. (U.S.) | — |
| Research Center for Musical Iconography (U.S.) | — |
| Research Council on Structural Connections (U.S.) | — |
| Research Foundation for Mental Hygiene (U.S.) | — |
| Retina Research Fund (U.S.) | — |
| Retired and Senior Volunteer Program (U.S.) | — |
| Retired Senior Volunteer Program (U.S.) | — |
| Retired Senior Volunteer Program (U.S.). | — |
| Retirement Services Program (U.S.) | — |
| Revolutionary Workers League of the U.S. | — |
| Rice Council for Market Development (U.S.) | — |
| Rice Millers' Association (U.S.) | — |
| Right Whale Recovery Team (U.S.) | — |
| Riparian Coordination Network (U.S.) | — |
| Rising Above the Gathering Storm Committee (U.S.) | — |
| Risk Reduction Engineering Laboratory (U.S.) | — |
| Road Weather Management Program (U.S.) | — |
| Rocky Flats Environmental Technology Site (U.S.) | — |
| Rocky Mountain Forest and Range Experiment Station (U.S.) | — |
| Rogue River-Siskiyou National Forest (Agency : U.S.) | — |
| Rose Atoll National Widlife Refuge (Agency : U.S.) | — |
| Royal Arch Masons (U.S.) | — |
| Royal Arch Masons. General Chapter (U.S.) | — |
| Royal Arch Masons. General Grand Chapter (U.S.) | — |
| Royal Arch Masons. General Grand Chapter (U.S.) | — |
| Royal Rangers (U.S.) | — |
| Royalty Management Program (U.S.) | — |
| Rubber Manufacturers Association (U.S.) | — |
| Rural Development Institute (U.S.) | — |
| Russia. Posolʹstvo (U.S.) | — |
| U.S./Russian Workshop on Planetary Protection Implementation on Future Mars Lander Missions (1992 Palo Alto, Calif.) | — |
| U.S.S.R. | — |