Soft Cover. Condizione: VERY GOOD. x-library softcover by Rolf K. Eckoff, Butterworth/Heineman, 1991, 1994 printing, ISBN 0750620072, 599 pp. including index, illustrated with tables, charts, drawings, graphs and B&W photos. Without the library stuff: NEAR FINE (very light corner wear to covers and some light rubbing to covers).