# - Undefined
$a - Affiliation (R)
$0 - Record control number (R)
A group with which the person is affiliated or has been affiliated through employment, membership, cultural identity, etc.
Uniform Resource Identifier (URI), for example a URL or URN, which provides electronic access data in a standard syntax. This data can be used for automated access to an electronic item using one of the Internet protocols.
In field 373, subfield $u is used to record the location of external or supplemental information accessible electronically.
100 1# $a Ashton, John 373 ## $a Faculty of Biological Science, Leeds University $s 2000 $t 2005 373 ## $a Faculty of Life Sciences, Manchester University $s 2005
The field includes subfield $2 so that if a controlled vocabulary is used, the source of the term used can be recorded.
Subfields for for dates (start period and end period) have also been included as the data recorded in the field may change over time. Subfield $a is repeatable and subfields $s and $t are non repeatable as a person may have more than one affiliation at a time. If this varies over time, the field is repeated.
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