(952$o). The value is set by providing the MARC field code (050, 082,
090, 852 are all common in MARC21) and the subfield codes without the
delimiters ($a, $b would be ab).
+
+- The field can also contain several MARC fields in priority order.
+ For example, 082ab,050ab,080ab,090ab will look in priority in 082ab, if
+ 082 is not filled in, it will look in 050ab, etc.
+
+ **Important**
+ When entering more than one MARC field, separate them with a comma, but do
+ not put spaces after the commas.
Examples: