Showing 1 - 4 results of 4 for search 'N.P Walker', query time: 0.05s Refine Results
  1. 1
    The measurement of nitrogen dioxide by simple diffusion tubes
    by N.P Walker
    Published 1985-12-01
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  2. 2
    The use of diffusion tubes to measure NO₂ in South Africa
    by N.P Walker
    Published 1987-12-01
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  3. 3
    A COMPARISON BETWEEN SOILING INDEX AND TOTAL CARBON CONCENTRATIONS
    by N.P. Walker, R.H. Ellerbeck
    Published 1986-06-01
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  4. 4
    NATIONAL SURVEY OF SMOKE AND SULPHUR DIOXIDE : QUALITY OF SMOKE MEASUREMENTS
    by N.P. Walker, R.H. Ellerbeck, E. Kemeny
    Published 1986-06-01
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