… paperboard, of a kind used for writing, printing or other graphic purposes, and non perforated punch-cards and punch …
Explanatory notes
… paperboard, of a kind used for writing, printing or other graphic purposes, and non perforated punch-cards and punch … paperboard, of a kind used for writing, printing or other graphic purposes, and non perforated punch-cards and punch … paperboard, of a kind used for writing, printing or other graphic purposes, for example : (1) Magazine paper and book …