Preferably, use a perforating wheel to cut,
but in lack of such, you can cut along lines with a scalpel,
taking care to not cut all the way to the edge.
Exhibition catalogue to accompany exhibition of work of Max Bill at Marlborough Gallery (London) from 14 Feb to 15 March 1974 and then at Marlborough Gallery Zurich from 7 June to 6 July 1974. Great condition, worth it for the cover alone.