Dmytryshyn, Basil Medieval Russia a source book, 900-1700. - New York Holt, Rinehart and Winston [1967] - viii, 312 p. maps. 21 cm. Bibliography: p. 304-312. LCCN: 66024391 //r863 Subjects--Geographic Terms: Soviet Union.--History--Sources. LC Class. No.: DK3 / .D57 Dewey Class. No.: 947.008