White, Minor. Zone system manual: previsualization, exposure, development, printing the Ansel Adams zone system as a basis of intuitive photography. - 4th ed. [new revised edition] - Dobbs Ferry, N.Y Morgan & Morgan 1972. - 112 p. illus. 19 cm. LCCN: 77001830 Subjects--Topical Terms: Photography--Handbooks, manuals, etc. LC Class. No.: TR146 / .W42 1968 Dewey Class. No.: 770.28