Petas, Frantisek. Medieval mosaic / Frantisek Petas, photo. by Alexander Paul, translated by Jean Rosemary Edwards. - [London] : Spring Books, [1959?] - 20 p. : col. illus., col. plates. ; 34 cm. Subjects--Corporate Names: Katedrala sv. Vita (Prague, Czech Republic) Subjects--Topical Terms: Mosaics--Czech Republic--Prague. LC Class. No.: NA5536.P7 / P481 [1959?]