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file | filename |
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EX-32.1 - EX-32.1 - NL INDUSTRIES INC | nl-ex321_17.htm |
EX-31.2 - EX-31.2 - NL INDUSTRIES INC | nl-ex312_16.htm |
EX-31.1 - EX-31.1 - NL INDUSTRIES INC | nl-ex311_18.htm |
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file | filename |
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EX-32.1 - EX-32.1 - NL INDUSTRIES INC | nl-ex321_17.htm |
EX-31.2 - EX-31.2 - NL INDUSTRIES INC | nl-ex312_16.htm |
EX-31.1 - EX-31.1 - NL INDUSTRIES INC | nl-ex311_18.htm |
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