As of 2017, the is the most recent major print release. However, the resource is now primarily available as a digital subscription that is updated quarterly to reflect current technology and industry standards.
Organizations like Accuris (formerly IHS Markit) also offer the 13th and 14th editions for professional purchase. Third-Party Previews As of 2017, the is the most recent major print release
Digital spreadsheets and interactive versions of the charts allow for more precise interpolation of data than reading a printed log-log graph by eye. Impact on Safety and Standardization As of 2017