Hartshorn, Norman Holt Practical optical crystallography / by N.H. Hartshorne and A. St uart - 2nd ed - London : Edward Arnold, 1969. - ix, 326. 3 plates (1 fold) p. : ill. ; 23 cm. Includes bibliographical references. Subjects--Topical Terms: Crystal optics. Dewey Class. No.: 548.9