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- Manuscripts (document genre)[remove]5
- Correspondence4
- Conservation and the Environment3
- Administrative reports2
- Aerosols2
- Annual reports2
- Atmospheric electricity2
- Atmospheric physics2
- Charts2
- Cloud physics2
- Drafts (documents)2
- Electrostatics2
- Lightning2
- Newsletters2
- Newspaper clippings2
- Photographs2
- Slides (photographs)2
- Technical reports2
- Thunderstorm electricity2
- Transparencies2