Attached files
file | filename |
---|---|
EX-32.2 - EX-32.2 - BLACK HILLS POWER INC | bhpex-322q22020.htm |
EX-32.1 - EX-32.1 - BLACK HILLS POWER INC | bhpex-321q22020.htm |
EX-31.2 - EX-31.2 - BLACK HILLS POWER INC | bhpex-312q22020.htm |
EX-31.1 - EX-31.1 - BLACK HILLS POWER INC | bhpex-311q22020.htm |
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