added script that extracts the symbol columns from the original Excel spreadsheets in order to merge them into OpenRefine project
added script that extracts the symbol columns from the original Excel spreadsheets in order to merge them into OpenRefine project

AmericanNumismaticSociety/migration_scripts,AmericanNumismaticSociety/migration_scripts,AmericanNumismaticSociety/migration_scripts,AmericanNumismaticSociety/migration_scripts