Welker, David. Theatrical direction; the basic techniques [by] David Welker. - Boston, Allyn and Bacon [1971] - xii, 419 p. illus. 24 cm. Bibliography: p. 407-408. LCCN: 79156795 Subjects--Topical Terms: Theater--Production and direction. LC Class. No.: PN 2053 / .W4