086 GOVERNMENT DOCUMENT CLASSIFICATION NUMBER (R)Indicators First Number source ^ Source specified in subfield $2 0 Superintendent of Documents Classification System 1 Government of Canada Publications: Outline of Classification Second Undefined; contains a blank (^)Subfield Codes $a Classification number (NR) $z Cancelled/invalid classification number (R) $2 Number source (NR) $6 Linkage (NR) $8 Field link and sequence number (R)