Johnson, Chris 1948- The practical zone system for film and digital photography : classical tool, universal applications / Chris Johnson. - 6th ed. - New York : Routledge, Taylor & Francis Group, 2017. - xxi, 352 p. : ill. ; 23 cm. Revised edition of: The practical zone system. Includes bibliographical references and index. ISBN: 9781138206298 (hardback : alk. paper) 9781138206311 (pbk. : alk. paper) 9781315465333 (ebk) LCCN: 2016051479 Subjects--Topical Terms: Zone system (Photography) Dewey Class. No.: 771 / J P