Cardiac Contractility: Coronary Circulation and Energetics of the Myocardium . Proceedings of an international symposium, Milan, Italy, 1966. G. Marchetti and B. Taccardi, Eds. Karger, Basel, 1967 (distributed in the U.S. by Phiebig, White Plains, N. Y.). xvi + 320 pp., illus. $18.