Morgan & Morgan, Inc., New Revised Edition, Third Edition, 1965 New York. 112 pages, 5 x 7 1/4", Soft Cover in good condition. This guide ot the Ansel Adams Zone System of Previsualization grows out of more than 20 years of teaching the system to students, privately and in schools. As a means of bringing students to a new and deeper grasp of the materials, processes and the very nature of photography, no better teaching tool exists. For the professional and commercial photographer, the Zone System results in a welcome economy of time and material. The ability to call his shot, everytime, adds immeasurably to the professional's confidence and competence.