by H.W. Fincham., Main Heritage Shelves General, CR4723 .F5 1933, Book, Item-ID: i10215323, BIB-ID: 1023168, Includes bibliographical references (p. 84-86).
by Laurence Binyon, J.V.S. Wilkinson and Basil Gray., Main Heritage Shelves General, ND3241 .B56 1933, Book, Item-ID: i15802425, BIB-ID: 1017816, Bibliography: p. 193-195.