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- 62060860 contributor B1535309.
- 62060860 contributor B1535310.
- 62060860 coverage "Potomac River Valley Economic conditions.".
- 62060860 created "1961]".
- 62060860 date "1961".
- 62060860 date "1961]".
- 62060860 dateCopyrighted "1961]".
- 62060860 extent "x, 90 p.".
- 62060860 issued "1961".
- 62060860 issued "1961]".
- 62060860 language "eng".
- 62060860 publisher "[Washington, U.S. Govt. Print. Off.,".
- 62060860 spatial "Potomac River Valley Economic conditions.".
- 62060860 subject "HC107.A12 A53".
- 62060860 title "Economic base survey of the Potomac River service area. Prepared for the Corps of Engineers, U.S. Army Engineer District, Washington, D. C.".
- 62060860 type "text".