Energy Methods in Finite Element Analysis. Edited by R. G LOWINSKI , E. Y. R ODIN and 0. C. Z IENKIEWICZ . Wiley, 1979. 361 pp. £17.50. Elementary Finite Element Method. By C. S. D ESAI . Prentice-Hall, 1979.434 pp. £16.20. Water and Steam, Their Properties and Current Industrial Applications. Edited by J. S TRAUB and K. S CREFFLER . Pergamon, 1980. 684 pp. $75.00 Heat and Fluid Flow in Power System Components. Edited by A. M. A. R EZK. Pergamon, 1979. 308 pp. £21.00.