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- ;Microbiology.;Microorganisms.;Microscopy.;Paramecium.;Microcinematography.1
- Arlington National Cemetery (Arlington, Va.)1
- Freedomland (New York, N.Y.).1
- Lincoln Memorial (Washington, D.C.)1
- Microbiology.1
- Microcinematography.1
- Microorganisms.1
- Microscopy.1
- Paramecium.1
- Pennsylvania Avenue (Washington, D.C.)1
- School field trips--United States.1
- Times Square (New York, N.Y.).1
- Washington (D.C.)--Buildings, structures, etc.1