How do we obtain verification for Canadian corporate headings?
If Canadian CIP information showing the LAC form of the heading is not available in the item, you may search OCLC to find headings formulated by LAC on LAC-issued bibliographic records and use these as authority in your 670 670 $a OCLC [date] $b (LAC hdg: ……. usage: …….) Alternatively, you may search the LAC authority file in the AMICUS database. Note that it is not necessary to search both these sources.