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New forms of instruments for showing the presence and amount of combustible gas in the air Volume Scientific Papers of the Bureau of Standards, Vol. 15, p. 47-90 (1918) Scientific
New forms of instruments for showing the presence and amount of combustible gas in the air Volume Scientific Papers of the Bureau of Standards, Vol. 15, p. 47-90 (1918) Scientific
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New forms of instruments for showing the presence and amount of combustible gas in the air Volume Scientific Papers of the Bureau of Standards, Vol. 15, p. 47-90 (1918) Scientific