Library of Congress >> MARC >> Bibliographic >> 01X-09X  >> 070

070 - National Agricultural Library Call Number (R)


MARC 21 Bibliographic - full
May 2017

First Indicator Second Indicator
Existence in NAL collection
# - No information provided
0 - Item is in NAL
1 - Item is not in NAL

Undefined
# - Undefined


Subfield Codes
  • $a - Classification number (R)
  • $b - Item number (NR)
  • $0 - Authority record control number or standard number (R)
  • $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Classification or call number that is assigned by the National Agricultural Library (NAL).

May also contain NAL accession numbers for visual materials.

Prior to 1965, NAL used a USDA library classification scheme. In 1965, NAL began using the Library of Congress Classification for all newly-cataloged materials. Serial-like items have retained the old call number whenever possible; thus, both schemes are still in use. NAL also assigns sequential accession numbers to dissertations and abstracts.

Prefixes may occur in NAL call numbers. "A" specifies a USDA publication in the old USDA scheme; "a" specifies a USDA publication in the LC classification scheme; "R" specifies a rare book; "J" specifies a juvenile book; and "Fo" specifies a folio publication.


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

First Indicator - Existence in NAL collection

Whether or not the item is contained in the NAL collection.

# - No information provided

Used for all call numbers assigned by institutions other than NAL.

070 ##$aSB945.A5
245 00$aAphids as crop pests/$cedited by Helmut F. van Emden and Richard Harrington.
0 - Item is in NAL
1 - Item is not in NAL

Second Indicator - Undefined

Undefined and contains a blank (#).

SUBFIELD CODES

$a - Classification number

Classification number portion of the NAL call number. Subfield $a is repeated to record alternative classification numbers.

070 0#$aHD3492.H8$bL3
070 0#$aTRANSL$b17828
[Number assigned to a translation.]

$b - Item number

NAL item number.

070 0#$a281.9$bC81A
[Number assigned from the USDA library scheme.]
070 0#$aQH301.A5 $b1981
[Number assigned from the LC classification scheme.]

$0 - Authority record control number or standard number

See description of this subfield in Appendix A: Control Subfields.

$8 - Field link and sequence number

See description of this subfield in Appendix A: Control Subfields.


INPUT CONVENTIONS

Punctuation - Field 070 does not end in a period unless the field ends in an abbreviation, initial/letter, or other data that ends in a period.

Capitalization - Alphabetic characters in the classification portion of the field are usually uppercase.


CONTENT DESIGNATOR HISTORY

Indicator 1 - Existence in NAL collection
# - No information provided [NEW, 2017]
Indicator 2 - Series call number (SE) [OBSOLETE]

In the serials specifications, the use of the second indicator position to indicate the type of series was made obsolete in 1976. The values were: 0 (No series involved), 1 (Main series), 2 (Subseries), 3 (Sub-subseries).

$0 - Authority record control number or standard number [NEW, 2017]

Library of Congress >> MARC >> Bibliographic >> 01X-09X  >> 070
(05/17/2017)
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