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The ultra-violet and visible transmission of various colored glasses. . KNOWN TRANSMITTANCE T. RATIO OF THICKNESSES b/b thicknesses and vice versa FlG. j—Reproduction of chart tised at Bureau of Standards for computing
straight edge - VICE
straight edge - VICE
the new sobriety: why straight edge is back
straight edge - VICE
More Than The X On Our Hands - A Worldwide Straight Edge Compilation (2000, Vinyl) - Discogs
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List of people who follow a straight edge lifestyle - Wikipedia