Attached files
file | filename |
---|---|
EX-32.2 - EXHIBIT 32.2 - NORTHERN TECHNOLOGIES INTERNATIONAL CORP | ex_219654.htm |
EX-32.1 - EXHIBIT 32.1 - NORTHERN TECHNOLOGIES INTERNATIONAL CORP | ex_219653.htm |
EX-31.2 - EXHIBIT 31.2 - NORTHERN TECHNOLOGIES INTERNATIONAL CORP | ex_219652.htm |
EX-31.1 - EXHIBIT 31.1 - NORTHERN TECHNOLOGIES INTERNATIONAL CORP | ex_219651.htm |
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