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MARC Coding

• All call numbers used by NLM are recorded in the 060 field with a 2nd indicator of 0 (zero) including LC class numbers used by NLM


• Classification numbers (including Table G notation and topical and geographic LCC breakdowns) are recorded in $a and the remaining parts of the call number are recorded in $b


• Unlike LCC practice, the information recorded in $b is not preceded by a period
  
  

  Examples:

  • 060 00 $a WK 252 $b T412s 2005
  • 060 10 $a BF 81 $b H6731 2009
  • 060 00 $a W2 KA8 $b N31
  • 060 00 $a HV 2476.5.B75
  • 060 00 $a WP 140 $b DVD no.1 2005


• Alternate topical class numbers being supplied for other libraries for serial analytics have 060 indicators of 10 because NLM is not shelving at that number
  
  

  Example:

  • 060 00 $a W1 $b MO57 v.26 1984 (analyzed serial)
  • 060 10 $a WC 100


• Libraries that use the NLM Classification may record their call numbers in an 060 field with a 1st indicator of blank and 2nd indicator of 4 to indicate not assigned by NLM