Category:1978 in Washington, D.C. by month
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- States of the United States
- Arizona
- California
- Florida
- Indiana
- Massachusetts
- Michigan
- Missouri
- Nevada
- New Mexico
- New York
- Oregon
- District of Columbia
- Washington, D.C.
- Insular areas
- Minor Outlying Islands
Subcategories
This category has the following 12 subcategories, out of 12 total.
- March 1978 in Washington, D.C. (33 F)
- May 1978 in Washington, D.C. (23 F)