Thanks to
Nick N0NCQ, I have scanned and posted 570-000-001 which is the cross-index to the 9-digit BSP/TC sections. I've never come across this one before, but sure wish I had!
This publication:
1) lets you go from the old manual number (like 235B for the LXD M28 TD) to the 9-digit sections 573-105-100, 575-127-703, etc, that make up later versions.
2) gives you a complete index of 9-digit numbers (like 574-228-100 is for the M35ASR Cabinet)
3) gives a cross-index from apparatus code to the proper 9-digit sections (like the
UCC M33 Call Control Unit entry lists the four applicable 9-digit sections)
Have Fun Exploring!