Understanding PNR Data Features by National Institute of Standards and Technology (source code)

= Understanding PNR Data Features by National Institute of Standards and Technology
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https://www.nist.gov/ncnr/understanding-pnr-data-features

Institutional NCNR explanation of thickness (Kiessig) fringes and critical-edge/scattering-length-density contrast. No named author or page publication date is asserted.