Johnstone, keith Impro : improvisation and the theatre / Keith Johnstone ; with an introduction by Irving Wardle - New York : Routledge/Theatre Arts Books , 1999. - xii, 375 p. ; 22 cm. Includes bibliographical references and index. ISBN: 9780878301171 LCCN: 99032225 Subjects--Topical Terms: Improvisation (Acting). LC Class. No.: PN2071.I5 / J63 1999 Dewey Class. No.: 792.028 JOH