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- 73172730 alternative "Key occupations in the petroleum and natural gas industries.".
- 73172730 contributor B2298474.
- 73172730 created "1969.".
- 73172730 date "1969".
- 73172730 date "1969.".
- 73172730 dateCopyrighted "1969.".
- 73172730 extent "v, 53 p.".
- 73172730 issued "1969".
- 73172730 issued "1969.".
- 73172730 language "eng".
- 73172730 publisher "[Washington]".
- 73172730 spatial "United States".
- 73172730 spatial "United States.".
- 73172730 subject "331.7/62/233820973".
- 73172730 subject "Gas industry United States Employees.".
- 73172730 subject "HD8039.P42 U66 1969".
- 73172730 subject "Occupations Classification.".
- 73172730 subject "Petroleum workers United States.".
- 73172730 title "List of key occupations in the petroleum and natural gas industries.".
- 73172730 type "text".