060 NATIONAL LIBRARY OF MEDICINE CALL NUMBER (R)Indicators First Existence in NLM collection ^ No information provided 0 Item is in NLM 1 Item is not in NLM Second Source of call number ^ No information provided [OBSOLETE] 0 Assigned by NLM 4 Assigned by agency other than NLMSubfield Codes $a Classification number (R) $b Item number (NR) $8 Field link and sequence number (R)