Holdings - 852 subfield g
What is this?
In a holdings record, 852 subfield $g is for "non-coded location qualifier"; that is, "Textual description that identifies the specific units of an item that are housed in a location different from that of the main holdings of the same item when the location qualifier cannot be expressed in coded form in subfield $f (Coded location qualifier)."
When is this trouble?
If your library does typically not use $g in holdings records, it may be in there accidentally:
852 0_ $b young $c yl4 $h PQ7797.C7145 $i Z75 $g ift852 0_ $b storage $c rs $f TP355 $g .K54 2010 $h TP355 $i .K54 2010852 0_ $b education $c edjnonfic $g JE $h J 599.67 WIL
If part of the call number is stored in a $g instead of a $i, that part of the call number may not show up in online catalog display, and may not have even made it to the spine label of the book.
How to Find
If you are in Alma, there is an analysis to search for this issue in the "Looking for Trouble" folder. Go to the "Holdings" folder and look for the "852 subfield g" analysis.