Helms, Michael E. Perspective drawing : a step-by-step handbook / Michael E. Helms. - Englewood Cliffs, New Jersey : Prentice Hall., 1990. - x, 342 p., [94] leaves of plates : ill. ; 28 cm. Includes index. ISBN: 0136592937 Subjects--Topical Terms: Drawing--Technique.Perspective. LC Class. No.: NC750 H45 1990