Horace Buttery, 1902-1962 : a memorial exhibition sponsored by the Directors of Agnews and Colnaghis, held at Agnew's Galleries ... London, from 11th June to 29th June 1963 / [organisers of the exhibition, Colin Agnew, Anthony Blunt, St. John Gore, Roderic Thesiger ; introduction by Anthony Blunt] / London : [Thos. Agnew and Sons, Ltd.] , 1963