Body measurements for the sizing of boys’ apparel (knit underwear, shirts and trousers) : a recorded voluntary standard of the trade. (OCLC #890709074)
RDA 2.17.2.3 (Title Source) describes a note that should be recorded if the title proper is taken from somewhere other than the preferred source of information; for example, the title page for a book. This book has no title page, so I used the caption title, and noted that, following the examples in the RDA text:
500 __ ǂa Caption title.
This note is core for LC/PCC. RDA itself does allow the note to be omitted if there is only one title on the piece, but the LC-PCC PS says not to omit.