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file | filename |
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EX-5.1 - EX-5.1 - NATIONAL FUEL GAS CO | d904416dex51.htm |
EX-1.1 - EX-1.1 - NATIONAL FUEL GAS CO | d904416dex11.htm |
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file | filename |
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EX-5.1 - EX-5.1 - NATIONAL FUEL GAS CO | d904416dex51.htm |
EX-1.1 - EX-1.1 - NATIONAL FUEL GAS CO | d904416dex11.htm |
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