Principles of Hydro-Elasticity. By F UMIKI K ITO . Published by the Memorial Committee for Retirement of Dr F. Kito, 1970. 129pp. $5.00. An Introduction to Tensor Calculus. By J ACQUES L. M ERCIER . Wolters-Noordhoff Publishing, 1971. 152pp. $6.45. Hydraulic and Pneumatic Power for Production , 3rd edition. By H. L. S TEWART . Industrial Press Inc. 1970. 476pp. $14.00. EQUATIONS OF MATHEMATICAL PHYSICS. By V.S. V LADIMIROV , edited by A. J EFFREY , translated by A. L ITTLEWOOD . Marcel Dekker Inc. 1971. 418pp. $19.75 or E9.40. Proceedings of Symposium on Turbulence Measurements in Liquids. Edited by G. K. P ATTERSON and J. L. Z AKIN . Continuing Education Series, Department of Chemical Engineering, University of Missouri-Rolla, 1971. 155pp. $8.00.