Performance evaluation of a demand-valve, power-assisted M17A1 protective mask / by E. G. Cummings, Samuel E. Jackson, Charles R.Bulette, Ronald P. Merkey.
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Performance evaluation of a demand-valve, power-assisted M17A1 protective mask / by E. G. Cummings, Samuel E. Jackson, Charles R.Bulette, Ronald P. Merkey.
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