The back bust measurement is a half-measurement based on the full bust measurement. It runs along the back and half way underneath the arm pit.
Side back (line), Patternmaking and Tailoring Wiki
Here's my block. I'm new to pattern drafting and about to do my first full bust adjustment so I'd like some advice please. Details in the comments :) : r/sewing
Sewing Measurements & Taking Measurements for Sewing
More than 80,000 Vintage Sewing Patterns on Vintage Patterns Wiki
Bdft ii, drafting & pattern making, unit-i, standard measurement
Bdft ii, drafting & pattern making, unit-i, standard measurement
JBlockCreator: An open source, pattern drafting framework to facilitate the automated manufacture of made-to-measure clothing - ScienceDirect
Side-front-bust (measurement), Patternmaking and Tailoring Wiki
Sewing Archives - University of Fashion Blog
Dress form - Wikipedia
JBlockCreator: An open source, pattern drafting framework to facilitate the automated manufacture of made-to-measure clothing - SoftwareX
Types of measurement, Patternmaking and Tailoring Wiki
Types of measurement, Patternmaking and Tailoring Wiki