Portland Public Library
Fossil fuels
Type
http://bibfra.me/vocab/lite/Topic
Label
Fossil fuels
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Incoming Resources
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4
Fossil fuels + Combustion + By-products + Law and legislation
Fossil fuels + Research
Focus of
5
Fossil fuels -- United States
Fossil fuels -- Juvenile literature
Fossil fuels -- Comic books, strips, etc
Sub focus of
6
Fossil fuels + Environmental aspects -- United States
Fossil fuels + Combustion + By-products + Law and legislation -- United States
Fossil fuels + Research -- United States
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