You might like Left Right Colour Structure 1 (trial proof) David Leverett 1971 Colour Structure 2 (trial proof) David Leverett 1971 Screen Test Michael Morris 1967 Begetting Green Jack Shadbolt 1967–8 Untitled Timothy Drever 1969 Geometry? Joe Tilson 1965 Ziggurat 6 Joe Tilson 1966 Roof Structure [illustration for ‘Folio 4, Dances 20-23’] Ian Tyson 1971 Red Assembly Brian Rice 1964 Goran Nasai Brian Rice 1963 Kuroi Brian Rice 1963 Painted Unit Relief Matt Rugg 1963