wichita.edu
…The current version is the A release, which is avalable from SAE. Vol. 6 Structural Sandwich Composites, Initial Release, August 2013Volume 6 captures much of the data and technology that was available in MIL-HDBK-23, but has been updated to reflect the current state-of-the-art. The 1st release is available from SAE. History of the Composites…
https://www.wichita.edu/industry_and_defense/NIAR/cmh-17/about-cmh-17.php