BS-2742 › Complete Document History
Use of the Ringelmann and miniature smoke charts
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2009 EDITION - USE OF THE RINGELMANN and MINIATURE SMOKE CHARTS - May 31, 2009
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Obsolete Revision Information: |
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1969 EDITION - NOTES ON THE USE OF THE RINGLEMANN and MINIATURE SMOKE CHARTS - Dec. 31, 1969
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