Methodological issues in drug usage surveys: anonymity, recency, and frequency.
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Adult↗
Biomedical subjects
A H Armstrong
Publications and source records attributed to A H Armstrong.
The Reflection of X-Rays by Alkali Halide Crystals.
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Journal Article↗
Note on the Experimental Determination of the Relative Intensities of Some of the Molybdenum and Copper K Series Lines and the Tungsten L Series Lines.
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Journal Article↗
The Influence on Secondary X-Ray Spectra of Placing the Tube and Radiator in a Box.
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Journal Article↗