Dowdell, John J. Zone systemizer for creative photographic control / [electronic resource] / John J. Dowdell III and Richard D. Zakia.. — Dobbs Ferry, N.Y. : : Morgan & Morgan,, 1973.. — 2v. : : ill. ; 24 cm. [1] Workbook. --[2] Zone systemizer. ISBN: 0871000407 9780871000408 LCCN: 73087272 Subjects--Topical Terms: Photography. LC Class. No.: TR147 / .D68