Guido, Ballo The Critical eye : A New Approach to Art Appreciation / Ballo Guido, translated by R. H. Boothroyd. - New York : G. P. Putnam's sons, 1969. - 291 p. : ill. ; 21 cm. - 73/75(73) (NLA) . Subjects--Topical Terms: Արվեստ Universal Decimal Class. No.: 73/75(73) (NLA)