060  National Library of Medicine Call Number (R)

Definition

Call numbers or class numbers based on the National Library of Medicine (NLM) Classification schedules and the Library of Congress (LC) Classification schedules.

If you assign a NLM classification number according to the NLM class schedules, use field 060 with 1st indicator value blank or 1 and 2nd indicator value 4 or field 096, although field 060 is preferred. If the classification portion of your number does not conform to the NLM class schedules, use field 099.

Guidelines

Enter spaces as shown on NLM or LC copy. For classes W1-9, no space intervenes between class letters and class numbers. For other classes, NLM uses a space between class letters and class numbers. LC does not use a space.

LC or NLM cataloging copy may include two NLM call numbers, the second in brackets following the first. Use field 060 subfield ǂa for the first NLM call number. Use a second subfield ǂa for the second NLM call number. Do not enter the brackets.

On some cataloging copy, the NLM call number follows the NLM subject headings. Use the appropriate fields for call numbers and subject headings.

For most nineteenth century titles, the class number assigned by NLM has letters only. Enter such numbers as follows:

Certain classification choices are recognized to be local decisions. Multiple call numbers in the same classification scheme in a WorldCat record may be appropriate under certain circumstances. For more information, see 050-099 Introduction to Call Numbers.

1st indicator

Existence in NLM collection. Indicates whether the item is in NLM's collections.

2nd indicator

Source of call number. The source of the call number

Subfields

Indexing

For indexing and searching information, see Searching WorldCat Indexes, field 060.

MARC 21

For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 060.