III. INSTRUMENTATION AND APPLICATIONS.OPTICAL AND PHYSICAL PROPERTIES OF DIFFRACTION GRATINGS FOR THE V.U.V. AND SOFT X-RAY REGION T. NAMIOKA et W. R. HUNTERJ. Phys. Colloques, 39 C4 (1978) C4-169-C4-187DOI: https://doi.org/10.1051/jphyscol:1978421